Campagnolo Chorus (FC-RE552) Ultra Drive EPS 10 Speed NOS Classic 52T 135 BCD Outer Chainring

✓ Original part - produced in the 2000s
✓ New old stock! Still unused after all these years
✓ Worldwide shipping

Campagnolo Chorus chainring, hailing from Italy and in production during the 2000s. Made from aluminium and weighing in at 90 grams. A fine choice for keeping your classic bike authentic, but also great for any other compatible bike too.


Condition - New Old Stock*
Model ID - FC-RE552
Production Era - 2000s
Country - Italian
Material - Aluminium
Weight - 90 g
Stock Code - D-CRO29C

*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.


Tooth Count - 52
Between Adjacent Bolt Holes - 79.4 mm
BCD - 135 BCD
Bolt Count - 5-Bolt
Chain Width - 3/32" (Standard)
Intended Speed* - 10 Speed


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.


Tooth Count - the number of teeth on the chainring, the higher the number the harder the gear.

Between Adjacent Bolt Holes - the measurement from the centre of any bolt hole to the centre of an adjacent one, if this measurement is the same as that of your crankset and the bolt count is the same then the chainring should fit.

BCD - stands for Bolt Circle Diameter (sometimes referred to as PCD - Pitch Circle Diameter) and is the technical way to determine whether the chainring fits your crankset. To calculate, multiply the distance between adjacent holes (in mm) by 1.709 (you’ll likely need to round the resulting number up or down a little).

Bolt Count - the number of bolts securing the chainring to the chainset. As with the BCD, this must be the same as your chainset.

Chain Width - 3/32” is the standard width for double and triple chainsets, wherease 1/8” chainrings are only found on single ring chainsets, generally for track / singlespeed use and can only be used with a wide 1/8" chain.

Intended Speed - the number of cogs at the back the chainring was designed to be used with. We refer to it as ‘intended’ speed as most double and triple chainsets will actually work with different speeds than originally intended, but the further away you get from the intended speed the more likely you are to experience minor setup issues. The exception being some chainrings intended for 10 speed use or higher, with these it’s better to stick to the intended speed.