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Topic starter
On the road bike , Ultegra Di2 10 speed groupset .
when on the big ring , and 1 from the top at the back , the chain suddenly drops onto the small ring and at the same time pulls the front mech bracket out of the frame , rivets just pulls out !
Replaced the rivets twice and it happened again this morning .
what could be causing it ?
chain is not catching .
Posted : 19/10/2016 8:53 pm
Bent tooth on ring
Bent chain link
Posted : 19/10/2016 8:55 pm
Topic starter
thanks , found dodgy link in the chain but i had to open it earlier to get front mech out so not sure when it happened .
Posted : 20/10/2016 6:01 am