I just recently bought a new bike equipped with shimano 105di2.
When following the FD adjustment instructions I noticed that I could not eliminate chain rub in the cross-chained scenario (as instructed in the shimano manual) as one par of the chainring would always be touching.
I took this video to inspect what’s going on and if you look closely it seems that also the small chainring has the same wobble. Does this mean the issue is the BB?
I have never had a pressfit BB before so I am a bit lost here. How can I check that the BB is installed correctly?
Thanks!
Chainring wobble on a new bike (potentially BB issue)
byu/Beginner_Cyclist inbikewrench
by Beginner_Cyclist