Silva Inox NOS Vintage 18-20 mm Seatpost Binder Bolt

✓ Original part - in production from the 1980s to the 1990s
✓ New old stock! Still unused after all these years
✓ Worldwide shipping

Silva seat post binder bolt (to clamp the frame around the seat pin), hailing from Italy and in production from the 1980s to the 1990s (yet still new & unused after all this time!). Made from stainless steel and weighing in at 10 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike.


Condition - New Old Stock*
Production Era - 1980s & 1990s
Country - Italian
Material - Stainless Steel
Weight - 10 g
Stock Code - D-SBB26V

*New old stock items may have marks from storage over the years, and as we often have multiples they can vary from piece to piece, but they are always genuine new & unused items.


Clamp Opening (Min-Max) - 18-20 mm
Outer Diameter - 8 mm
Bolt Fixing Type - Allen Key (Both Sides - No 'Key' Locator)


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.


Clamp Opening - the minimum and maximum distance between the inside of the nut and bolt heads. The minimum is measured with the bolt tightened as much as possible (for hex head types this may mean the bolt end will stick quite far out of the nut). For the maximum opening we ensure 5-6 mm of thread remainis in the nut for a secure fixing.

Outer Diameter - the part that goes through the frame, most steel frames will take an 8 mm bolt whereas early lugged aluminium frames often have a larger hole that takes a 10 mm bolt diameter.

Bolt Fixing Type - some binder bolts have tightening mechanisms on both sides to secure the seatpost in the frame. Single sided bolts need something else to help; some have knurled parts that grip the inside of the bolt hole, others have a small notched 'key' locator that lines up with a cut-out in the frame (if you have one).