T.D.C Vintage Cottered English Bottom Bracket Cups

T.D.C Vintage Cottered English Bottom Bracket CupsOriginal parts in production from the 1940s to the 1950s Suitable for historic cycling events such as L'Eroica Professionally checked & cleaned Worldwide shipping T. D. C left and right bottom bracket cup set, hailing from Great Britain and in production from the 1940s to the 1950s. Made from steel and weighing in at 98 grams (for the pair). A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike. If you're

✓ Original parts - in production from the 1940s to the 1950s
✓ Suitable for historic cycling events such as L'Eroica
✓ Professionally checked & cleaned
✓ Worldwide shipping

T.D.C left and right bottom bracket cup set, hailing from Great Britain and in production from the 1940s to the 1950s. Made from steel and weighing in at 98 grams (for the pair). 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 any other vintage event, these are fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong BB cups!

The cups have been thoroughly checked, cleaned and graded as very good condition, but do take a good look at the detailed photos so you can see the cosmetic condition before you buy.

OVERVIEW

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Race Condition - Very Good
Production Era - 1940s & 1950s
Country - British
Material - Steel
Weight - 98 g
Stock Code - U-G3-BB-CS15V

TECHNICAL INFO

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Bottom Bracket Type - Cottered (15.8 mm Axle Diameter)
Thread Type - English Thread (British/ISO 1.37" x 24 TPI)

▼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 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.

EU Customers – for orders under €150 (excluding shipping), VAT will be collected at checkout, but from 1st July 2026, due to new EU import regulations, there may also be a customs duty payable to the carrier. For orders over €150, all import fees will be payable to the carrier, with nothing collected at checkout.

USA Customers – import fees are now collected at checkout for all orders to the US, so there won’t be any surprise charges when your order arrives.

Other International Customers – local import fees may still apply, charged by your customs office or courier before delivery. These are not collected by us, so please check your local rates before purchasing.

Any applicable fees will appear at checkout.

▼SAFETY & COMPLIANCE

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This product complies with the EU General Product Safety Regulation (GPSR). Professional installation and regular inspections are recommended. Due to the product's age, extra care should be taken during use.

EU Authorised Representative - Global Trade Department NI Ltd, Office 834, Unit 6, 100 Lisburn Road, Belfast BT9 6AG, Northern Ireland

▼HELP SECTION

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Bottom Bracket Type - ‘square taper’, as the name suggests have square shaped axle ends that slot into the chainset 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.

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 cups, they often 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.