Description: 【Precise 34.9mm Fit】: Double screws clamp Ideal for mountain bike riders requiring secure saddle positioning, this 34.9 mm / 1.37 inch diameter clamp ensures exact compatibility with standard seat tubes. No more slippage or misalignment during aggressive trail rides or bumpy descents 【Sturdy Aluminum Alloy】: Crafted from quality lightweight aluminum alloy, it resists corrosion and deformation under heavy loads. Ideal for all weather cyclists 【Tool Free Adjustment】: Road Bike Seatpost Clamp is Ideal for commuters and trail explorers, no more fumbling with complex wrenches to fine tune your saddle position 【Vibration Dampening】: Engineered to absorb shocks from rough terrain, maintaining saddle stability on paths. No more constant readjustments after hitting potholes or roots during off road adventures 【Universal Compatibility】: Compatible for road bikes, MTBs, and hybrid frames with 34.9 mm / 1.37 inch seat tubes. Ideal for multi bike owners Specification: Material: Aluminum Alloy Size Chart: Inner Diameter: 3.49cm/1.37inch Package Includes: 1 Bike Seat Post Clamp Note: Please allow slightly errors due to manual measurement and different monitors.