Originally Posted by
Doge
We have both. Trainers are used for warming up. Rollers are for riding better.
I've posted this before - but appropriate here.
https://vimeo.com/109371142
Cool

Reminds me of Einsteins gedankenexperiment: if a rider is spinning on rollers on board a train that is travelling at the speed of light, what is the speed of the spoke at the top of the wheel?