wtd: 37, 38 or 39 tooth inner chainring 130bcd

[grogee]

To suit 10 speed although I'm using "7-speed" biopace rings with a 10-speed SRAM rival system at the moment with no issues!

 

[mattr]

38 is the smallest you can put on 130 bcd!

 

[riddim-track]

I've got a 39t dura ace inner ring with load of life left, yours for a fiver if you want.