135mm Bolt Circle Diameter (Modern Campagnolo) 5-Bolt chainrings

135 Bolt Circle Diameter (BCD) 5-Bolt chainrings on this page, listed by maker:
Campagnolo: 39-tooth Veloce | C10 42-tooth | C10 50-tooth Ultra Drive | 50-tooth UD | 52-tooth Mirage | 52-tooth Chorus | 53-tooth 9-speed Exa Drive
Quality Bicycle Parts: 52-tooth
Stronglight: 39-53 Red/Green Italian Limited Edition set | 39-53 black paired set | 39-53 silver paired set | 39-tooth green | 40-tooth silver | 53-tooth red
T.A.: 58-tooth
Vuelta: 54-tooth | 56-tooth

Back to master list of available chainrings

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Bolt Circle Diameter is the diameter of the circle formed by the centers of the chainring fixing bolts. With 4-bolt cranksets, this is easy to measure. 5-bolt cranks are more difficult. Modern Campagnolo standard cranksets have a 135mm bolt pattern with 74mm for inner triple rings.

If you are unsure about what size chainring you need, Wolf Tooth Components has an excellent guide to measuring your rings.

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Campagnolo Veloce 39-tooth, 135 BCD ring. Used

We have two: #1 | #2

Campagnolo Veloce 39-tooth, 135 BCD ring #1. Used, $40.00

The front side

And the same ring flipped over

Campagnolo Veloce 39-tooth, 135 BCD ring #2. Used, $40.00

This ring has many miles to go before it sleeps.

And the ring's other side

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Campagnolo C10 42-tooth 10-speed chain ring, 135 BCD. New, $150.00

Part# 62256

• We have one in stock.
• Though this can be used as an inner ring on a double crankset, it was designed to be mounted as the middle ring on a triple crankset with a 30-tooth ring for the small inner.
• All the pins and ramps on it are spaced and timed to lift the chain from a 30-tooth ring. That is why it is stamped "C10 42/30"
• It is intended for "10-speed" set-ups.

All the data is engraved on the ring.

Here's why it is best to use this ring as the middle ring of a triple. It has all the pins and cuts to lift the chain from a 30-tooth inner.

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Campagnolo C10 50-tooth 10-speed Ultra Drive chain ring, 135 BCD. New, $150.00

Part# 62221

• All the pins and ramps on it are spaced and timed to lift the chain from a 40-tooth ring. That is why it is stamped "C10 50/40
• It is intended for "10-speed" set-ups.
• It will work well as the outer ring on both double and triple set-ups

All the info is engraved on the ring.

The back, with the pins and ramps.

And it will come in its Campagnolo factory packaging,

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Campagnolo C10 50-tooth 10-speed UD chain ring, 135 BCD. New, $150.00

Part# 62223

• We have two in stock.
• All the pins and ramps on it are spaced and timed to lift the chain from a 40-tooth ring. That is why it is stamped "C10 50/40
• It is intended for "10-speed" set-ups.
• It will work well as the outer ring on both double and triple set-ups

Nice and new and shiny and Campagnolo. What more could you ask for?

The back side showing the pins and divots to lift the chain up on to the ring.

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Campagnolo Mirage 52-tooth 135 BCD chainring. Used, $40.00

Part# 62239-U

• 9/10 speed compatible, designed to work on a triple, but will be fine as part of a double set-up.
• Designed to work with 42-tooth inner ring.
• Campagnolo part# FC-M1352

Lots of miles left in this ring.

And here's the other side.

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Campagnolo Chorus 52-tooth 9-speed 135 BCD ring. Used, $75.00

Part# 62244

Perfect, classic Campagnolo design

And just as nice from the back

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Campagnolo 53-tooth 9-speed Exa-Drive ring, 135 BCD. Used, $50.00

• This ring is designed to be used with a 39-tooth inner.
• It's a nine-speed ring

It's used, but has many miles left in it.

And the same ring flipped over

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Quality Bicycle Parts 52-tooth Engagement Ring, 135 BCD. New, $80.00

Part# 62233

• We have six in stock
• 7075 Aluminum alloy
• Made in USA
• CNC Machined with shift-assist ramps & steel pickup pins

Well-designed, well-made.

The back side with all the fancy shifting stuff.

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Stronglight paired 39-53 Red/Green Italian Limited edition 135 BCD rings for 9/10 speeds. New, $150.00

Part# 62240

We have separate red 53 rings here and green 39 rings posted here

• We have 6 sets in stock.
• 7075 high-strength aluminum
• Made for 9/10-speed systems

When Torelli produced a few limited edition Italian flag (red/white/green) anniversary framesets, the Stronglight crankset company offered to make special chainrings to complement the bikes. Of course, these chainrings will go with any bike that would be enhanced with these striking, beautifully-made rings.

Here's the paired set.

Here's a close-up of the 53 red

The back of the red 53.

And here's the green 39

And the back of the green 39

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Stronglight paired 39-53 Black 135 BCD rings for 9/10 speeds. New, $120.00

Part# 62254

• We have 2 sets in stock.
• 7075 high-strength aluminum
• Made for 9/10-speed systems

The set

Close of the big ring

And the 53's back

Here's the 39.

And the back of the 39

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Stronglight paired 39-53 Silver 135 BCD rings for 9/10 speeds. New, $120.00

Part# 62253

• We have 2 sets in stock.
• 7075 high-strength aluminum
• Made for 9/10-speed systems

Here's the paired set

Here's a close-up of the big ring. These are beautifully finished.

The back of the 53

Here's the 39 that's going to get up that steep hill.

The 39's flip side

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Stronglight-produced 39-tooth green Italian Limited Edition 135 BCD inner chainring for 9/10 speeds. New, $125.00

Part# 62240-39

Matching red 53 rings are here.

• We have 6 in stock.
• 7075 high-strength aluminum
• Made for 9/10-speed systems

When Torelli produced a few limited edition Italian flag (red/white/green) anniversary framesets, the Stronglight crankset company offered to make special chainrings to complement the bikes. Of course, these chainrings will go with any bike that would be enhanced with these striking, beautifully-made rings.

Ready to make your bike look special

The back side

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Stronglight 40-tooth silver 135 BCD chainring 9/10-speed systems. New, $55.00

Part# 62250

We have nine in stock

Stronglight does nice work.

The chainring's back

This ring is new, in its factory packaging.

The back of the package

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Stronglight-produced 53-tooth red Italian Limited Edition 135 BCD chainring for 9/10 speeds. New, $150.00

Part# 62240-53

Matching green 39 rings are here.

• We have 6 in stock.
• 7075 high-strength aluminum
• Made for 9/10 speed systems

When Torelli produced a few limited edition Italian flag (red/white/green) anniversary framesets, the Stronglight crankset company offered to make special chainrings to complement the bikes. Of course, these chainrings will go with any bike that would be enhanced with these striking, beautifully-made rings.

You can see that Stronglight went out of its way to machine these rings to really stand out.

Here's the back of the ring. You can see the pins to help lift the chain up on to the big ring.

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T.A. 58-tooth, 135 BCD chainring. Used, $65.00

Part# 62264

T.A. parts are always beautifully finished.

Here's the flip side.

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Vuelta 54-tooth 135 BCD chainring. New, $45.00

Part# 62237

Made in the USA

From the front

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Vuelta 56-tooth 135 BCD chainring. Lightly used, $35.00

• Made in the USA
• We're pretty sure this is Vuelta production

This big boy is nearly new.

And back side.

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