Dr Pulley sliding weights vs rolling weights

I see Unionmaterials offers (manufactures) sliding weights (which all are seemingly familiar with) as well as roller weights (like the stock rollers except made of the same nylon material as sliders).

Does anyone know why you would want the slider vs. the roller in the Dr Pulley aftermarket lineup? It seems as though everyone choose the sliders.

do some searching here and you'll see many opinions, so I won't go into much detail here, but the sliders allow for higher RPMs at slower speeds (faster acceleration) at the same time offer lower RPMs at higher speeds (better MPG)

Thanks for doing all the research and saving me a lot of time.

I am now at 17,000 and getting ready to change my belt and while in there change to Dr. Pulley set up

IDwingit wrote:

Does anyone know why you would want the slider vs. the roller in the Dr Pulley aftermarket lineup?

http://www.unionmaterial.com/rollerweight6.htm