AL6061-T6 alloy quick-release seatpost clamp. Stainless steel bushing ensures smooth lever action. Adjustment knob allows for on-the-fly fine-tuning. Rounded edges and floating bolt/ovalized hole design protects carbon frames and seatposts. 28.6mm for 25.4mm seatpost and steel frame. 29.8mm for 27.2mm seatpost and chromoly frame. 31.8mm for 27.2mm seatpost and aluminum frame. 34.9mm for 30.9mm seatpost and aluminum frame or 31.6mm seatpost and carbon frame. 16mm height

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