T.D.C Vintage English Thread Bottom Bracket Lockring

T.D.C Vintage English Thread Bottom Bracket LockringOriginal BB lockring in production from the 1960s to the 1980s Suitable for historic cycling events such as L'Eroica Checked & cleaned Worldwide shipping T. D. C bottom bracket lockring (or locking ring if you prefer), hailing from Great Britain and in production from the 1960s to the 1980s. Made from steel and weighing in at 21 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike. If you're taking

✓ Original BB lockring - in production from the 1960s to the 1980s
✓ Suitable for historic cycling events such as L'Eroica
✓ Checked & cleaned
✓ Worldwide shipping

T.D.C bottom bracket lockring (or locking ring if you prefer), hailing from Great Britain and in production from the 1960s to the 1980s. Made from steel and weighing in at 21 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 any other vintage event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong lockring

The lockring's been checked, cleaned 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

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Condition - OK
Production Era - 1960s - 1980s
Country - British
Material - Steel
Weight - 21 g
Stock Code - U-G5-BB-L5V

TECHNICAL INFO

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Bottom Bracket Thread Type - English Thread (British/ISO 1.37" x 24 TPI)
Thread Direction - Right
Thickness - 3.5 mm

▼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). Due to the product's age, extra care should be taken during installation and 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 Thread Type - this must match the thread of your bottom bracket for the lockring to fit.

Thread Direction - most bottom brackets only have an adjustable cup on the non-driveside of the bike, so lockrings mostly thread to the right (clockwise), regardless of the thread type. However, some bottom brackets have adjustable cups on both sides so the thread direction may be different.

Thickness - this is rounded to the nearest 0.5 mm.