Originally Posted by
mattm
Help; I need it.
In the crit yesterday I was sprinting up the side of the field to move up, when out of nowhere my chain dropped off the big ring (to the outside). Besides nearly eating **** in front of a bunch of pros, and hitting my chin on my bars, I'm mostly baffled as to how that's even possible.
I wasn't shifting, hadn't hit a bump, etc. The chainring is about 3 years old, chain is much newer, but have never had a problem with it until now. Chorus fwiw.
I did see a tiny nick on one of the teeth of the big ring; I wonder if that was from the gravel stage the day before or something..
Anyway what can cause this, and wtf can I do to fix it??
I need confidence in my chain again!!
yeah I've been dropping off to the outside too.. usually during a soft peddle shifting from inner to large... annoying. Also on the trainer during Zwift sprints it's falls when hitting 800-900w.. I can kind of feeling it, so I let off. I'm on 9070 Di2... pretty much did what Chris is saying... it's been good for 2 weeks now both inside and outside.