Why does my 12 speed Shimano not fit on my Kickr Core? When it had a 11 speed fitted before…
all fits well until the second last ring is fitted. It just doesn’t fit 
This segment may be of interest, though it’s obviously for a different trainer.
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Thanks… it’s just a much tighter fit then… used force and a hammer… and now it’s on… just a totally different feel than the old 11 speed that fits easily…