Hope Tech 4 X2 Disc Brake - Rear - Left Lever - 1720mm - Black - BlueThe all new Tech 4 X2 builds on Hope's 25+ years of experience designing and manufacturing hydraulic brake systems. The Tech 4 uses all new internal sealing for reduced friction and the pivot spins on roller bearings, allowing the spring rate to be reduced. The lower spring rate gives a lighter lever action, reducing rider fatigue and keeping our legendary feel and modulation. Combine this with the updated X2 Postmount caliper for a super lightweight