Cannondale's Jekyll 4 blasts up climbs like a short-travel bike, but then hit the switch for the descent and you'll see where the name comes from. Its light, strong SmartFormed aluminum frame boasts large-diameter tubing for efficient power transfer and has a 1.5-inch head tube that keeps the 160mm-travel RockShox Pike fork pinned on your chosen line. A Fox Dyad rear shock crushes bumps with your choice of either 160 or 95mm of travel to meet the demands of the trail and your style of riding. Since the Jekyll lets you climb as well as you descend, you have a 20-speed Shimano drivetrain with a stiff, lightweight Hollowtech crankset to help you put the power down. Other trail-dominating components include Shimano Deore brakes and tubeless-ready, 27.5-inch WTB/Formula wheels with through-axle hubs that are ready for you to push the Jekyll to the max.