The EM-MA28X38HL-29ER-UL is a structurally evolved carbon rim developed by KOIBIKE specifically for endurance racing and high-intensity all-mountain riding. Its 38mm diameter accommodates tires sized 2.1- to 2.6-inch, and its 28mm structural depth provides a stable balance between lightweight and impact resistance. Weighing 490 ± 15g per rim, it utilizes high-modulus Toray carbon fiber with an impact energy dissipation ply to effectively absorb high-frequency impact forces during continuous descents, rock ledges, and jumps. The 3mm offset spoke holes optimize tension distribution and enhance the wheelset's structural consistency under asymmetric loads. It supports tire pressures from 18–30 psi and is tubeless compatible, making it suitable for modern low-pressure, wide-tire strategies. Available in four finishes: UD, marble, 12K plain, and 12K twill, it meets both performance and aesthetic needs.
Email More
