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melle 
BHPC Member 
Joined: 07 February 2023 Location: Bath Status: Offline Points: 198 |
 Topic: Free double + triple Biopace chaniringsPosted: 24 August 2025 at 3:49pm |
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I know Biopace chainrings have their fans, but I'm not one of them... I have a 52/42 double and a 48/38/28 triple set, both 5x130+74 BCD, that may be useful to someone. The middle ring of the triple is quite worn, and it looks like the bike it came off had a bit of a front derailleur issue... That said, I'll send them to you completely free of charge. EDIT: silver 42T now spoken for.  
Edited by melle - 24 August 2025 at 5:17pm |
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Optima Stinger | 2x Baron
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LWaB
BHPC Member
Joined: 13 August 2016 Status: Offline Points: 277 |
Posted: 24 August 2025 at 10:28pm |
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The two larger triple rings (48t, 38t) are 110mm BCD, not 130mm BCD like the double rings (52t, 42t).
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melle
BHPC Member
Joined: 07 February 2023 Location: Bath Status: Offline Points: 198 |
Posted: 25 August 2025 at 9:06am |
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Bloody hell, sharp! I hadn't checked... Are all Shimano triples 110?
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Optima Stinger | 2x Baron
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LWaB
BHPC Member
Joined: 13 August 2016 Status: Offline Points: 277 |
Posted: 25 August 2025 at 9:24am |
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No. Their compact MTB triples are smaller than 110mm BCD and Shimano did road triples with 130 + a couple of different granny BCDs.
https://sheldonbrown.com/cribsheet-bcd.html might help.
Edited by LWaB - 25 August 2025 at 9:26am |
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melle
BHPC Member
Joined: 07 February 2023 Location: Bath Status: Offline Points: 198 |
Posted: 25 August 2025 at 12:41pm |
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It's pretty confusing, innit... Thank god for the late Sheldon!
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Optima Stinger | 2x Baron
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melle
BHPC Member
Joined: 07 February 2023 Location: Bath Status: Offline Points: 198 |
Posted: 04 September 2025 at 4:21pm |
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Triple set now gone, just the 5T 130BCD chainring left.
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Optima Stinger | 2x Baron
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nils
Visitor (new) 
Joined: 19 August 2007 Location: France Status: Offline Points: 7 |
Posted: 12 September 2025 at 11:33am |
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Do you still ahve the two chain rings? would you ship internationally tofrance?
best Regards Daniel |
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CU nils
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melle
BHPC Member
Joined: 07 February 2023 Location: Bath Status: Offline Points: 198 |
Posted: 12 September 2025 at 11:38am |
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I only have the 52T 130BCD one left. As there was little interest here,
I've stuck it on eBay. I'll accept a £1 offer and can post it to you
through their shipping programme if that's OK.
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Optima Stinger | 2x Baron
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melle
BHPC Member
Joined: 07 February 2023 Location: Bath Status: Offline Points: 198 |
Posted: 17 September 2025 at 8:06am |
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All gone now.
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Optima Stinger | 2x Baron
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Free double + triple Biopace chanirings
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