shimano biopace bcd?

[longun]

a good friend has some mint cranks with biopace rings,does anybody know the bcd so i can get some proper rings and anywere to get them from

cheers

 

[cherrybomb]

Standard ATB 110mm, so you should be able to get replacement rings most places.

 

[retrojon]

Think it is fairly traditional.

74mm, 110mm, 130mm.

Give it a few more years and Biopace will make a comeback!

 

[cherrybomb]

Give it a few more years and Biopace will make a comeback!

Yeah, but it'll be called 'Duel Torque' and cost 3x as much!

 

[velomaniac]

74mm/110mm is the usual for biopace.

Cheers