The XC-M25X27HL-29ER-UL is KOIBIKE's ultra-light carbon fiber rim designed for modern lightweight XC platforms. Its 25mm frame height achieves a precise balance between lateral stiffness and dynamic response, while its 27mm external width optimizes the airbag geometry for 1.8-2.2-inch tires, enhancing grip and predictable handling. Weighing a mere 285±15g per rim, the rim utilizes high-modulus Toray carbon fiber with gradient layup technology to significantly reduce rotational mass, enhancing starting agility and climbing efficiency. It supports tire pressures from 22-31psi and is tubeless compatible, improving puncture resistance on challenging trails. Its matte UD finish combines an industrial aesthetic with weather resistance, making it an ideal choice for XC riders and high-end OEMs seeking ultimate efficiency.
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