Originally Posted by
IthaDan
The x400 chainrings won't be ramped and pinned and could very well be biopace. That being said, I've put newer ramped and pinned large rings (all you need on a double, no need for ramps nor pins on the smaller ring) on older cranksets in the past with amazingly positive results in front shifting.
I'm currently running a 6600 large ring and a superbe pro 38t ring on my 9 speed (6510) race bike. Shifts great.
I was thinking there might have been an issue chain wise between 64xx and 65/66xx; you know, a 9 speed chain with
an 8s/9s chain ring mix. Sounds like there isn't an issue after all... cool!
