Crank Arm / Spider & Chainrings - Right
Unbranded Vintage Single 48T 170 mm Right Crank Arm / Chainring Set
£22.50 £30.00
✓ Original part - in production from the 1950s to the 1960s
✓ Suitable for historic cycling events such as L'Eroica
✓ Professionally checked & cleaned
✓ Worldwide shipping
Unbranded vintage right crank/chainring set, most likely in production from the 1950s to the 1960s. Made from steel and weighing in at 612 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 crank!
The crank has been carefully cleaned, thoroughly checked by one of our mechanics and graded as OK condition, but do take a good look at the detailed photos so you can see the cosmetic condition before you buy.OVERVIEW
Chainring Condition - OK
Production Era - 1950s & 1960s
Material - Steel
Weight - 612 g
Stock Code - U-CR-SR7V
TECHNICAL INFO
Chainring Count - Single
Tooth Count - 48
Crank Arm Length - 170 mm
Pedal Threads - Standard (9/16" x 20 TPI)
Bottom Bracket Type - Cottered
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▼SHIPPING, TAXES & RETURNS
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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 normally despatch orders on Tuesdays and Fridays, although larger items may occasionally take an extra day or two to prepare.
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.
EU Customers - for orders under €150 (excluding delivery), import VAT and the new €3 customs duty are paid as part of your order - nothing further to pay on delivery! For all other orders, import fees will be payable to the carrier before delivery, with nothing collected at checkout.
USA Customers - import fees are now collected at checkout for all orders to the USA, so there won’t be any surprise charges when your order arrives.
Other International Customers - local import fees may apply and are not collected by us. Please check your country's import rules before purchasing.
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▼HELP SECTION
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Chainring Count - the number of chainrings on the crank. Fixed gear track bikes, single-speeds and some geared bikes use a single chainring, road bikes commonly use a double (two rings) and most touring bikes and mountain bikes will use a triple chainset (three rings).
Tooth Count - the number of teeth on the chainring(s), the higher the number the harder the gear.
Crank Arm Length - this is measured from the absolute centre of the bottom bracket hole to the centre of the hole for the pedal.
BCD - stands for Bolt Circle Diameter (sometimes referred to as PCD - Pitch Circle Diameter) and is only really needed when changing chainrings. To calculate the BCD, measure the distance in millimeters from the centre of any chainring bolt to the centre of an adjacent one and multiply it by 1.709 (you’ll likely need to round the resulting number up or down a little to get your BCD measurement).
Pedal Threads - the pattern of the thread that your pedals screw into, this is usually stamped on the pedals themselves and most bikes use a standard thread of 9/16” x 20 tpi. The exceptions being older French bikes, bikes with cheaper one-piece type chainsets and Shimano’s Dyna Drive system (easily identifiable as the pedal holes are about an inch wide!).
Bottom Bracket Type - ‘square taper’, as the name suggests have a square shaped axle that slots into the crank and ‘cottered’ axles are round and secured by pins - pretty much every bike up until the 1990s would use one of these, cottered being the much earlier system. Since then, different manufacturers have introduced their own systems that are not interchangeable so you must use a crank that matches.