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Topic ClosedFree double + triple Biopace chanirings
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melle View Drop Down
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Joined: 07 February 2023
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Points: 198 		Direct Link To This Post Topic: Free double + triple Biopace chanirings
    Posted: 24 August 2025 at 3:49pm
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
Optima Stinger | 2x Baron
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LWaB View Drop Down
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Points: 277 		Direct Link To This Post Posted: 24 August 2025 at 10:28pm
The two larger triple rings (48t, 38t) are 110mm BCD, not 130mm BCD like the double rings (52t, 42t).
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melle View Drop Down
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Points: 198 		Direct Link To This Post Posted: 25 August 2025 at 9:06am
Bloody hell, sharp! I hadn't checked... Are all Shimano triples 110?
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LWaB View Drop Down
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Points: 277 		Direct Link To This Post Posted: 25 August 2025 at 9:24am
No. Their compact MTB triples are smaller than 110mm BCD and Shimano did road triples with 130 + a couple of different granny BCDs.

Edited by LWaB - 25 August 2025 at 9:26am
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melle View Drop Down
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Points: 198 		Direct Link To This Post Posted: 25 August 2025 at 12:41pm
It's pretty confusing, innit... Thank god for the late Sheldon!
Optima Stinger | 2x Baron
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melle View Drop Down
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Points: 198 		Direct Link To This Post Posted: 04 September 2025 at 4:21pm
Triple set now gone, just the 5T 130BCD chainring left.
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nils View Drop Down
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Points: 7 		Direct Link To This Post Posted: 12 September 2025 at 11:33am
Do you still ahve the two chain rings? would you ship internationally tofrance?
best Regards Daniel
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melle View Drop Down
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Points: 198 		Direct Link To This Post Posted: 12 September 2025 at 11:38am
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.
Optima Stinger | 2x Baron
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melle View Drop Down
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Points: 198 		Direct Link To This Post Posted: 17 September 2025 at 8:06am
All gone now.
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