Want XC pedal efficiency with trail-bike descending prowess? Pivot's Mach 4 will make you a believer — there's no squat, no wallow, just pure power transfer when you rip on the pedals. And, you've got four inches of dw-link suspension backing you up when you hit the chunder. Whether the trail is a buff rollercoaster or techy singletrack, you'll dig the tapered head tube, stout 92mm-wide BB and svelte carbon suspension links that boost frame stiffness and enhance steering precision. All of this with Fox's Float CTD rear shock giving you plush, tunable travel for all your riding and racing needs. And, to start off your dream build, the Mach 4 Frame Kit includes a plush 120mm Fox fork, Pivot headset, and your choice of a Shimano or SRAM bottom bracket.