When discussing the pros and cons of the big wheeled bikes, shorter riders find themselves in an ambivalent situation. They want to benefit from the 29” wheels, but suffer from the negative effects when fit is considered. Additionally, the increase in rotational weight challenges many lower watt producing riders, so the performance gains are negated when the rider cannot accelerate the wheel system as quickly. The solution for many riders is 27.5”. Boost is a hub and drivetrain standard developed by SRAM. Boost is built around a wider rear and front hub and enables stiffer wheels due to a wider spoke bracing angle. Boost 148 rear hubs move each flange of the rear hub three millimeters wider.