Hi there,

I changed the rear wheel on my road bike. I had been using my good set (fulcrum) on it, while on the turbo trainer.
My mechanic said I should change to another wheel, because there was no point wearing out the expensive wheel on the turbo.

I switched over the tyre, tube, cassette and spacers. Problem is that now in the lowest gear the chain drops / comes off.

What's my best course here, add another spacer to try to fix the wheel offset, or invest time adjusting the derailleur stops and gear indexing.
I am nervous of the latter - because it will mean spending time adjusting and readjusting with the thumb adjuster.

The bike is a 2021 Cube Attain Race - their endurance model. Thanks.