Specialites T.A. Professionel 5 Vis (25) NOS/NIB Vintage 50.4 BCD Chainring Bolts Set

Specialites T.A. Professionel 5 Vis (25) NOS/NIB Vintage 50.4 BCD Chainring Bolts SetOriginal parts in production from the 1950s to the 1980s New old stock & still in the original packaging! Suitable for historic cycling events such as L'Eroica Worldwide shipping Specialites T. A. Professionel 5 Vis chainring bolts, hailing from France and in production from the 1950s to the 1980s (yet still new & unused after all this time!). Made from steel and weighing in at 21 grams. A fine choice for keeping your vintage bike authentic, but also

✓ Original parts - in production from the 1950s to the 1980s
✓ New old stock & still in the original packaging!
✓ Suitable for historic cycling events such as L'Eroica
✓ Worldwide shipping

Specialites T.A. Professionel 5 Vis chainring bolts, hailing from France and in production from the 1950s to the 1980s (yet still new & unused after all this time!). 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 too.

If you're taking part in L'Eroica, Anjou Velo, Velo Retro or another similar vintage cycling event, this is fully compliant - so rest assured, the pre-1987 police won't lock you up for having the wrong chainring bolts!

OVERVIEW

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Condition - New Old Stock - In Original Packaging*
Model ID - 25
Production Era - 1950s - 1980s
Country - French
Material - Steel
Weight - 21 g
Stock Code - D-CRB23V

*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.

TECHNICAL INFO

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Chainring Count - Double
Crank Type - 50.4 BCD
Mount Type - Crank to Chainring (Standard)
Back Nut Length (Excluding Head) - 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.

▼HELP SECTION

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Chainring Count - the number of chainrings the bolts are designed to fit, this must be the same as the number of chainrings you are using.

Crank Type - Most cranks require the standard 5-bolt sets that consist of 5 bolts with backs that slot into the rear of the crank spider, there are also some less common cranks with 3 arms that require the 3-arm chainring bolts. Specialites T.A. 'Professionel 5 Vis' and Stronglight '49D' type cranks require special 50.4 BCD chainring bolts that are specific to these crank designs.

Mount Type - most bolts simply fix the chainring to the crank, but some cranks require bolts to fix one chainring to another.

Back Nut Length (Excluding Head) - the more chainrings your crank has the longer the bolts and nuts need to be. We exclude the head part from the measurement (the bit that often sits recessed in back of the chainring).