The YDX-TORC is Yamaha’s 27.5 hardtail mountain bike powered by the all-new PW-X Drive System. An agile XC mountain bike with aggressive performance and fast response. PW-X is Yamaha’s lightest and most responsive drive unit designed to deliver a totally new mountain bike riding experience. Five levels of assist provide power for every situation in a way that feels smooth and natural. We call it “Pure Ride”, and with one ride you’ll understand why.