Measurement Methods: The bicycle seatpost clamp should match the diameter of the seat tube on your frame and not the diameter of the seatpost itself
Secure and Stable: The bicycle seat clamp provides a strong hold on the seat post, firmly to prevent movement. The maximum torque shall not exceed 9 Nm. Even under your full weight when cycling the seat tube clip will remain secure and tightly fastened
Strong and Durable: 6061-T6 aluminum alloy bike seat clamp optimized for light weight and high strength. Polished and buffed, the surface is smooth and comfortable to the touch
Lightweight: FIFTY-FIFTY seatpost clamp features a lightweight design, weight only 0.83oz(28.6mm), 0.83oz(29.8mm), 0.85oz(31.8mm), 0.87oz(34.9mm), 0.87oz(36.4mm), 0.93oz(38.6mm). Will not add weight to bicycles, making it easy for you to ride
Universal Compatibility: The seat post clamps are available in 6 different sizes, so they can fit most bikes, like mountain bikes, folding bikes, track bikes, fixed gear bikes, road bikes, etc.