The XC-M25X30HL-29ER-UL is KOIBIKE's structural innovation for the next-generation, lightweight, wide-body XC/Trail platform. Its low 25mm frame height maintains lateral stiffness while achieving extremely low rotational mass. Its 30mm external width reshapes the support structure for tires 1.9–2.35 inches, improving tire tension consistency and contact patch. Weighing a mere 260±15g per rim, its high-modulus Toray carbon fiber allows the bike to handle challenging terrain. It supports tire pressures from 21–32 psi and is tubeless compatible, improving impact resistance and grip at low tire pressures. Its matte UD finish blends industrial texture with environmental adaptability, making it the ultimate choice for those pursuing the "light yet not bulky, wide yet not stagnant" riding philosophy.
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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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