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135mm Bolt Circle Diameter (Modern Campagnolo) chainrings

135 Bolt Circle Diameter (BCD) chainrings on this page, listed by maker:
Campagnolo: 39-tooth Record | 40-tooth
Quality Bicycle Parts: 50-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

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.


Campagnolo Record 39-tooth ring, 135 BCD. Lightly Used, $70.00

Part# 62249

Campagnolo chainring

Side one, with Campy's data stamped on it.

Campagnolo Record chainring

And the flip side


Campagnolo C10 40-tooth 10-speed triple middle ring, 135 BCD. New, $150.00

Part# 62224

  • We have two 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 40/30
  • It is intended for "10-speed" set-ups.

Camapagnolo C10 40-tooth ring

The data is stamped on this side

Campagnolo chainring

All the pins and ramps to lift it up from an inner 30-tooth ring are on this side.

Campagnolo chainring

And it is new, in its factory packaging.


Quality Bicycle Parts 50-tooth Engagement Ring, 135 BCD. New, $35.00

Part# 62232

  • 7075 Aluminum alloy
  • Made in USA

50-tooth chainring

Side one

Chainring

And the flip side.


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.

Stronglight chainrings

Here's the paired set.

Stronglight chainring

Here's a close-up of the 53 red

Stronglight 53 chainring

The back of the red 53.

Stronglight chainring

And here's the green 39

Stronglight chainring

And the back of the green 39


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

Part# 62254

  • We have 4 sets in stock.
  • 7075 high-strength aluminum
  • Made for 9/10-speed systems

Stronglight chainrings

The set

Stronglight chainring

Close of the big ring

Stronglight chainring

And the 53's back

Stronglight 39 chainring

Here's the 39.

Stronglight 39-tooth chainring

And the back of the 39


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

Part# 62253

  • We have 4 sets in stock.
  • 7075 high-strength aluminum
  • Made for 9/10-speed systems

Stronglight silver chainrings

Here's the paired set

Stronglight chainring

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

Stronglight chainring

The back of the 53

Stronglight 39-tooth chainring

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

Stronglight chainring

The 39's flip side


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.

Stronglight chainring

Ready to make your bike look special

39 tooth ring

The back side


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

Part# 62250

We have nine in stock

Stronglight chainring

Stronglight does nice work.

Stronglight 40-tooth chainring

The chainring's back

Stronglight

This ring is new, in its factory packaging.

Stronglight chainring package

The back of the package


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.

Stronglight 53 chainring

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

Stronglight chainring 53

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


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

Part# 62264

TA Chainring

T.A. parts are always beautifully finished.

TA Chainring

Here's the flip side.