I've being using a trainer for a couple of weeks, and apparently it's damaging my tyre:
As you can see the tyre is "polished", and on top of that I'm seeing small rubber pieces on the floor. The culprit is the tension roller:
The problem is: the resistance right now is quite low, I just touched the roller on the tyre and then I gave the knob 3 turns. It's not too tight, and even so it's clearly damaging the tyre.
Is this normal? What can I do?