Slated for cross-country riding and racing, the Mach 4 SL Pro XT/XTR 120 Carbon Wheel Mountain Bike from Pivot is one of our short travel go-to options. The 100mm of rear travel is powered by DW-Link, which is one of our favorite rear linkage designs for its predictable tracking in uneven terrain. The Mach 4 SL is extremely efficient thanks to its steep 67. 5-degree head tube angle, which provides reactive steering characteristics and an efficient position for pedaling out of the saddle. The Fox StepCast 34 fork provides 120mm of travel to stand up to increasingly demanding modern XC courses, and it features a remote for on-the-fly lockout control. The Mach 4 SL rolls on 29in wheels for their ability to carry momentum over long sprints, and their enhanced rollover capabilities that come in handy for rock steps and off-camber roots. This XT/XTR Pro build packs impressive value, starting out with a hybrid 12-speed drivetrain that strikes the perfect balance between being lightweight, durable, and affordable. The Reynolds Blacklabel XC wheels are another build highlight, with lightweight carbon construction that enhances the bike’s acceleration without compromising strength. Shimano XT brakes provide the instant bite point that they are so well known for, while Maxxis Rekon Race tires keep things fast-rolling and efficient. This high-performance build is perfectly suited to the cross-country racer, or for the trail rider who prioritizes efficiency and speed. *Due to a high demand in the global supply chain and bike industry since the start of the pandemic, material weight and exact components are subject to change. We are working diligently to keep tech specs updated, and any adjustments will be of equal or better spec level. If you have any questions, reach out to a Gearhead by chatting online or calling 1-888-276-7130.