Minoura: Live Roll R500 rollers are a fantastic training aid. They improve your form, sharpen your bike handling skills and give you the real road ride like workout you need. Fully adjustable, smooth and quiet the R500 help you improve your bike handling technique, skills and fitness all at the same time.FEATURESImproves bike control , balance and pedalling style,The return of the big diameter drum,Light weight alloy rollers,105mm big diameter roller will offer more smooth riding,More controlled roll for all abilities,Folds into 2 for easy storage and transport,Rustproof and lightweight alloy construction,Anodized finish so static won’t build up,Wheelbase adjustable from 970mm to 1,090mm,Compatible with Zwift & Trainer Road (When using compatible sensors),Made in Japan.