Mach 4 SL Expert XT Di2 40.5 Fewer Pumps: 35cc per stroke

Fewer Pumps: 35cc per stroke means you spend less time off the bike

Down-tube shifters are still cool

digging in for confidence in loose corners

This doesn't go against technicality at all

a Selle Italia Model X saddle for comfort over rough surfaces

Mach 4 SL Expert XT Di2 40.5 Fewer Pumps: 35cc per strokeThe Mach 4 SL is XC, distilled to its fastest formengineered for efficiency, sharpened for precision and built to master the modern racecourse. Born from the crucible of World Cup XC and epic endurance racing, it balances a feathery build with an obsession for stiffness, control and efficiency. This is Pivots sharpest tool for riders who live in the red zone, engineered to crush climbs and meet the intense demands of real trails where races are