Rally RK200 Pedal Power Meter Size:One Size slipping and wear and tear 231315 slipping and wear and tear anywhereRockBand Flex allows athletes of any fitness level to build muscle and improve athletic performanceLatex Free Featuring a superior design with sensors housed inside these pedals are designed with your favourite LOOK KEO cleats in mindMake sure you’re ready for those long rides and training sessions with up to 120 hours of battery lifeMeasure power from your left leg versus power from your right leg to get a better look at how symmetrically you’re producing powerEnsure proper cleat position by keeping track of where power is applied on the pedal