Michelin Power RS 140/70 R17 66H Rear TyreMichelin Power RS 140 70 R17 66H Rear Tyre The Michelin Power RS is engineered to raise the bar clear across the board performance without compromise. Michelins Adaptive Casing Technology uses a single ply carcass at an angle close to 90 to reduce rigidity and increase grip at the crown of the tire, yet folds that single ply over on itself on each sidewall to stiffen it, resulting in less sidewall flex and better tracking through corners. To further