Promax QR-1 Quick Release Seatpost Clamp (Black) (34.9mm)

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Promax QR-1 Seatpost Clamps are cold forged and CNC machined from 6061-T6 aluminum alloy. The QR-1, as the name implies, has a quick release lever, making seat height adjustments a snap. Weighing just 30 grams (1.1 oz) in the 31.8 size, it’s as lightweight as it is tough.

Features:

  • The head of the lever and the face of the clamp are given a proprietary low-friction surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing
  • Laser-etched graphics and stainless steel hardware

Specifications:
Diameter: 31.8mm or 34.9mm
Material: Aluminum
Color: Black
Weight: 30g (31.8mm)