Originally Posted by KINGS HOCKEY

I am looking to buy a set of rollers. I have never used them so I'm not sure which are better and why. These will be used for some indoor training. Looking to get qualilty, but not the most expensive.
Is the diameter of the roller a big concern? Aluminum or PVC rollers? Do the PVC rollers lose shape? Parabolic or not? Are resistance units needed or wanted? What parts wear out and can they be replaced?
Thanks for your opinions.