Zipp 3ZERO MOTO Rim 27.5 Holes: 32 Slate/Stealth RearSingle wall Moto Technology allows the rim to pivot from either side of the spoke bed while traversing rough terrain. As the wheel encounters obstacles, each edge of the rim is designed for compliance, creating the feel of extra suspension. Higher impact resistance Reduced chance of pinch flatting More traction in rough corners Smoother ride in rocky terrain Ability to run lower tire pressure Reduced rider fatigue Rim profiles and graphics are