Originally Posted by
jim p
Several months ago I replaced my double with a triple biopace crank. For these several months I have only ridden in the small and middle chain ring with no problem.
Have you guys ever noticed this with a biopace chain ring or am I doing something wrong which is causing this.
Hello.
No, no similar problem.
My ol'reliable 1990 steel bike had Biopace Triple as standard. No problem at all in 22 years and a LOT of miles.
The set up on mine was index shifting 7 speed Deore on the rear, friction shifting on the front. Works like a charm.
You mention that the biopace was a recent change. I would suspect that the front changing mechanism that worked well on your previous double chainring has the reach for 2 chainwheels, as you state, but not for the additional one - another 3/4 inch or so of cable reach.
I'm no mechanic, but that's my hypothesis.
I hope you get it to work fine and enjoy it!
(In short, I think its a 'double to triple' issue, not a 'biopace' issue