Box One QR Seat Clamp

Helix QR seat clamps are cold forged and CNC machined from 6061-T6 aluminum alloy. A quick release lever makes adjusting your seat height quick and easy. Weighing just 28 grams/1 ounce in the 31.8 size, it’s as lightweight as it is tough.

The head of the quick-release lever and the face of the clamp are given a proprietary Š—“zero frictionin surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing.

Available in 31.8 and 34.9 in anodized red, blue, gold and black clamps with black levers and gold pivots, laser-etched graphics and titanium hardware. Material 6061-T6 Aluminum, Titanium (hardware) Size 31.8 or 34.9mm Weight 27 grams / 0.95 ounces (31.8)