So I just got my first direct drive trainer a Kickr Core. I put my Trek Domane SL6 Disc on it and when I spin the crank it feels awful. It sounds like there’s a grinding coming through my bottom bracket and rear cassette. I have the same cassette as my rear wheel (Ultegra 11-32t) and I guessed everything would just transfer over and be smooth, like riding on the road. Any ideas of what’s going on?
I’ve tried changing the cable tension, looser or tighter effects the shifting but not the grinding or slight click (maybe 2-3 per crank rotation). I’ve looked at the hanger and it looks straight, never had an issue with it on the road. I’ve got the TA adapters in for the 12x142 size.
In the box with the teainer there was a silver thin spacer, but I didn’t use it, is that something I should have? The instructions were not all that clear.
Suggestions? I shouldn’t have to adjust when going from trainer to road with a direct drive trainer should I?