Big Old Sale - All Items 5% Off

Sakae/Ringyo (SR) SR-FX NOS Vintage English Thread 123 mm Bottom Bracket

£61.75 £65.00

✓ Original part - produced in the 1970s
✓ New old stock! Still unused after all these years
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sakae/Ringyo (SR) SR-FX bottom bracket, hailing from Japan and in production during the 1970s (yet still new & unused after all this time!). Made from steel and weighing in at 325 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong bottom bracket!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 working days but larger items can often take a little longer to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay (even with the new post-Brexit trade deals, some countries may charge you import VAT & clearance fees so please bear this in mind when purchasing).

Sakae/Ringyo (SR) Royal (RY-BBS) Triple NOS Vintage English 118.5 mm Bottom Bracket

£71.25 £75.00

✓ Original part - in production from the 1970s to the 1980s
✓ New old stock! Still unused after all these years
✓ Lightweight for the era - just 270 grams
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sakae/Ringyo (SR) Royal bottom bracket, hailing from Japan and in production from the 1970s to the 1980s (yet still new & unused after all this time!). Made from steel and weighing in at 270 grams - pretty lightweight for a bottom bracket at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong bottom bracket!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

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Thread Type - this must match the bottom bracket thread on your frame. The 3 common thread types on classic and vintage bikes are English (also known as British or ISO), Italian & French, and are usually (not always!) found on frames built in their respective countries. If you're replacing a bottom bracket the cups should have the thread type stamped on one of them, if not there are a couple of things to look at; bottom bracket shell width (English & French = 68 mm, Italian = 70 mm) & drive side cup thread direction (English = left, Italian & French = right). The only curveball to watch out for here, although pretty uncommon, are Swiss threads (also found on some French frames, Motobecanes being one) which will have the same shell width & thread direction as an English thread frame but the actual thread pitch will be different. If none of the above matches what you have, there are a few lesser known varieties that will require some further research.

Axle Length - your crankset dictates the axle length you need and the recommendation should be used to avoid issues with chainline. If you're replacing a bottom bracket that works perfectly then this can be matched, otherwise you'll need to check the manufacturers spec, a good resource for older bikes is Velobase.

Axle Type - you can tell which type of axle you need by looking at the shape of the bottom bracket hole in your crankset. For square tapers, the ISO introduced a standard for European makers in the early 90s, JIS then did the same in Asia. Before then it was not so simple, and although there is a degree of interchangeability, the best way to make sure you have the right axle is to stick to the same brand from the same era, ideally the proprietary model.

Sakae/Ringyo (SR) Custom-P3 (CT-P3) NOS Vintage 26.2 mm Seatpost

£47.50 £50.00

✓ Original part - produced in the 1980s
✓ New old stock! Still unused after all these years
✓ Lightweight for the era - just 294 grams
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom-P3 seatpost, hailing from Japan and in production during the 1980s (yet still new & unused after all this time!). Made from aluminium and weighing in at 294 grams - pretty lightweight for seatposts at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong seatpost!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Seatpost Diameter - this needs to match the internal diameter of your frame’s seat tube closely, it should be possible to insert the seatpost without force but the fit should be tight enough so it doesn’t just drop in, with no play once inserted. If you have a post that fits the measurement should be stamped somewhere near the bottom, if not you’ll need to measure with a caliper or seatpost sizing tool as the sizes go up in 0.2 mm increments.

Length (Centre of Rails to Base) - measured from where the centre of the saddle rails will sit once installed, all the way to the bottom of the seatpost. Normally there’s a mark to tell you how much of the seatpost needs to be inserted in the frame, however this isn’t always the case so we’d recommend allowing a minimum of 6 cm.

Sakae/Ringyo (SR) NOS Vintage English Thread 118 mm Bottom Bracket

£61.75 £65.00

✓ Original part - produced in the 1980s
✓ New old stock! Still unused after all these years
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sakae/Ringyo (SR) bottom bracket, hailing from Japan and in production during the 1980s (yet still new & unused after all this time!). Made from steel and weighing in at 340 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong bottom bracket!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

Sakae/Ringyo (SR) MTS Vintage 110 mm 1" Quill Stem

£19.00 £20.00

✓ Original part - produced in the 1980s
✓ Checked & cleaned
✓ Worldwide shipping

Sakae/Ringyo (SR) MTS stem, hailing from Japan and in production during the 1980s. Made from aluminium/steel and weighing in at 507 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike too.

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Extension Length (ctc)* - we measure from the centre of the handlebar clamp to the centre of the shaft, to the point where the stem bolt passes through, to the nearest 5 mm. We always take this measurement in a straight line through middle of the extension, not along the top. In some cases the stem may be stamped with a different extension length as some manufacturers measured differently, but we always use our own measurement for consitency.

Quill Size - the most common size for classic and vintage road bikes is 1", this should be the same as the outside diameter of your fork's steerer column. Oversized steerers found on mountain bikes and later road bikes will be either 1 1/8" or 1 1/4".

Steerer Size (ID) - this is the most important measurement when checking the stem fits your bike. This should match the measurement of the inside of your fork's steerer column, where the stem will be inserted. The standard size for road quill stems was 22.2 mm, or 22.0 mm in France until the 1980s.

Total Shaft Height - measured from the top where the expander bolt head sits, to the bottom of the stem's shaft. To give you an idea of how high the stem can be set, there should be an absolute minimum of 50 mm inserted into the fork steerer, although most stems come with a 'minimum insertion line' to help with this.

Clamp Size - this should match the outside diameter of your handlebars and should be as close as possible to ensure a good and safe fit.

Sakae/Ringyo (SR) Custom Road Champion Vintage 39 cm Drop Handlebars

£38.00 £40.00

✓ Original bars - produced in the 1980s
✓ Suitable for historic cycling events such as L'Eroica
✓ Checked, cleaned & tape residue removed
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom Road Champion drop handlebars, hailing from Japan and in production during the 1980s. Made from aluminium and weighing in at 260 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

If you're taking part in L'Eroica or a similar vintage event, these are fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong bars!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Width (ctc)* - measured at the ends of the drops, from the centre of one side to the other (ctc), to the nearest cm. In some cases the bars may display a different width as some brands measure outside to outside rather than ctc, but we always use this measurement for consistency.

Shape - Classic' drops have a smooth curve, 'anatomic' have multiple angles for different hand positions, 'compact' are short reach with a shallow drop and randonneur bars are usually classic in shape but flare out at the drops.

Clamp Size - this should match the internal diameter of your handlebar stem clamp, and should be as close as possible to ensure a good and safe fit.

Drop (ctc) - from the top flat section to the bottom of the drops, measured from the centre of one to the other with the flat part at the end of the drops parrallel to the ground.

Reach (ctc) - measured from the centre of the top section to the centre of the 'curve' at its furthest point, giving you the maximum reach. We measure this with the flat part at the end of of the drops parrallel to the ground.

Cable Groove - these allow you to run your cables neatly underneath the handlebar tape, if your setup requires this.

Sakae/Ringyo (SR) Custom-P5A (CT-P5A) Laprade Aero Vintage 27.2 mm Seatpost

£23.75 £25.00

✓ Original part - produced in the 1980s
✓ Lightweight for the era - just 257 grams
✓ Professionally checked & cleaned
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom-P5A seatpost, hailing from Japan and in production during the 1980s. Made from aluminium and weighing in at 257 grams - pretty lightweight for seatposts at that time. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Seatpost Diameter - this needs to match the internal diameter of your frame’s seat tube closely, it should be possible to insert the seatpost without force but the fit should be tight enough so it doesn’t just drop in, with no play once inserted. If you have a post that fits the measurement should be stamped somewhere near the bottom, if not you’ll need to measure with a caliper or seatpost sizing tool as the sizes go up in 0.2 mm increments.

Length (Centre of Rails to Base) - measured from where the centre of the saddle rails will sit once installed, all the way to the bottom of the seatpost. Normally there’s a mark to tell you how much of the seatpost needs to be inserted in the frame, however this isn’t always the case so we’d recommend allowing a minimum of 6 cm.

Sakae/Ringyo (SR) Custom Road Champion Vintage 39 cm Drop Handlebars

£38.00 £40.00

✓ Original bars - in production from the 1970s to the 1980s
✓ Suitable for historic cycling events such as L'Eroica
✓ Checked, cleaned & tape residue removed
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom Road Champion drop handlebars, hailing from Japan and in production from the 1970s to the 1980s. Made from aluminium and weighing in at 275 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

If you're taking part in L'Eroica or a similar vintage event, these are fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong bars!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Width (ctc)* - measured at the ends of the drops, from the centre of one side to the other (ctc), to the nearest cm. In some cases the bars may display a different width as some brands measure outside to outside rather than ctc, but we always use this measurement for consistency.

Shape - Classic' drops have a smooth curve, 'anatomic' have multiple angles for different hand positions, 'compact' are short reach with a shallow drop and randonneur bars are usually classic in shape but rise up then flare out at the drops.

Clamp Size - this should match the internal diameter of your handlebar stem clamp, and should be as close as possible to ensure a good and safe fit.

Drop (ctc) - from the top flat section to the bottom of the drops, measured from the centre of one to the other with the flat part at the end of the drops parrallel to the ground.

Reach (ctc) - measured from the centre of the top section to the centre of the 'curve' at its furthest point, giving you the maximum reach. We measure this with the flat part at the end of of the drops parrallel to the ground.

Cable Groove - these allow you to run your cables neatly underneath the handlebar tape, if your setup requires this.

Sakae/Ringyo (SR) Custom-P3 (CT-P3) NOS Vintage 26.6 mm Seatpost

£47.50 £50.00

✓ Original part - produced in the 1980s
✓ New old stock! Still unused after all these years
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom-P3 seatpost, hailing from Japan and in production during the 1980s (yet still new & unused after all this time!). Made from aluminium and weighing in at 302 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong seatpost!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Seatpost Diameter - this needs to match the internal diameter of your frame’s seat tube closely, it should be possible to insert the seatpost without force but the fit should be tight enough so it doesn’t just drop in, with no play once inserted. If you have a post that fits the measurement should be stamped somewhere near the bottom, if not you’ll need to measure with a caliper or seatpost sizing tool as the sizes go up in 0.2 mm increments.

Length (Centre of Rails to Base) - measured from where the centre of the saddle rails will sit once installed, all the way to the bottom of the seatpost. Normally there’s a mark to tell you how much of the seatpost needs to be inserted in the frame, however this isn’t always the case so we’d recommend allowing a minimum of 6 cm.

Sakae/Ringyo (SR) Custom-P5 (CT-P5) Laprade Fluted NOS Vintage 26.8 mm Seatpost

£42.75 £45.00

✓ Original part - produced in the 1980s
✓ New old stock! Still unused after all these years
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Sakae/Ringyo (SR) Custom-P5 seatpost, hailing from Japan and in production during the 1980s (yet still new & unused after all this time!). Made from aluminium/steel and weighing in at 321 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

If you're taking part in L'Eroica or a similar vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong seatpost!

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Seatpost Diameter - this needs to match the internal diameter of your frame’s seat tube closely, it should be possible to insert the seatpost without force but the fit should be tight enough so it doesn’t just drop in, with no play once inserted. If you have a post that fits the measurement should be stamped somewhere near the bottom, if not you’ll need to measure with a caliper or seatpost sizing tool as the sizes go up in 0.2 mm increments.

Length (Centre of Rails to Base) - measured from where the centre of the saddle rails will sit once installed, all the way to the bottom of the seatpost. Normally there’s a mark to tell you how much of the seatpost needs to be inserted in the frame, however this isn’t always the case so we’d recommend allowing a minimum of 6 cm.

Sakae/Ringyo (SR) The Tube Cr-Mo NOS Classic 130 mm 1 1/8" Quill Stem

£28.50 £30.00

✓ Original part - produced in the 1990s
✓ New old stock! Still unused after all these years
✓ Worldwide shipping

Sakae/Ringyo (SR) The Tube stem, hailing from Japan and in production during the 1990s (yet still new & unused after all this time!). Made from steel and weighing in at 502 grams. A fine choice for keeping your classic bike authentic, but also great for any other compatible bike.

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Extension Length (ctc)* - we measure from the centre of the handlebar clamp to the centre of the shaft, to the point where the stem bolt passes through, to the nearest 5 mm. We always take this measurement in a straight line through middle of the extension, not along the top. In some cases the stem may be stamped with a different extension length as some manufacturers measured differently, but we always use our own measurement for consitency.

Quill Size - the most common size for classic and vintage road bikes is 1", this should be the same as the outside diameter of your fork's steerer column. Oversized steerers found on mountain bikes and later road bikes will be either 1 1/8" or 1 1/4".

Steerer Size (ID) - this is the most important measurement when checking the stem fits your bike. This should match the measurement of the inside of your fork's steerer column, where the stem will be inserted. The standard size for road quill stems was 22.2 mm, or 22.0 mm in France until the 1980s.

Total Shaft Height - measured from the top where the expander bolt head sits, to the bottom of the stem's shaft. To give you an idea of how high the stem can be set, there should be an absolute minimum of 50 mm inserted into the fork steerer, although most stems come with a 'minimum insertion line' to help with this.

Clamp Size - this should match the outside diameter of your handlebars and should be as close as possible to ensure a good and safe fit.

Sakae/Ringyo (SR) Silver NOS Vintage 60 mm 1" Quill Stem

£23.75 £25.00

✓ Original part - produced in the 1980s
✓ New old stock! Still unused after all these years
✓ Worldwide shipping

Sakae/Ringyo (SR) stem, hailing from Japan and in production during the 1980s (yet still new & unused after all this time!). Made from steel/aluminium and weighing in at 309 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.

OVERVIEW

TECHNICAL INFO

▼SHIPPING, TAXES & RETURNS

---

We've been safely sending orders around the world since 2010. There's a handy shipping calculator on the shopping cart page so you can see the cost of postage as soon as you've added it to your basket. Your order will be carefully packed and sent with tracking & insurance, we despatch most orders within 2-3 days but larger items and orders placed before the weekend can take an extra day or two to process.

We accept returns, please notify us within 14 days and ensure the item arrives back with us no later than 30 days after the order was received.

We don't charge VAT, however, if buying from outside of the UK please remember that there may be import fees to pay directly to the delivery company before receiving the order. Unfortunately we can’t advise on the exact costs as it varies from country to country, so please check your national rates before purchasing.

▼HELP SECTION

---

Extension Length (ctc)* - we measure from the centre of the handlebar clamp to the centre of the shaft, to the point where the stem bolt passes through, to the nearest 5 mm. We always take this measurement in a straight line through middle of the extension, not along the top. In some cases the stem may be stamped with a different extension length as some manufacturers measured differently, but we always use our own measurement for consitency.

Quill Size - the most common size for classic and vintage road bikes is 1", this should be the same as the outside diameter of your fork's steerer column. Oversized steerers found on mountain bikes and later road bikes will be either 1 1/8" or 1 1/4".

Steerer Size (ID) - this is the most important measurement when checking the stem fits your bike. This should match the measurement of the inside of your fork's steerer column, where the stem will be inserted. The standard size for road quill stems was 22.2 mm, or 22.0 mm in France until the 1980s.

Total Shaft Height - measured from the top where the expander bolt head sits, to the bottom of the stem's shaft. To give you an idea of how high the stem can be set, there should be an absolute minimum of 50 mm inserted into the fork steerer, although most stems come with a 'minimum insertion line' to help with this.

Clamp Size - this should match the outside diameter of your handlebars and should be as close as possible to ensure a good and safe fit.