Promax QR-1 Seatpost Clamp - 34.9mm QR Gold keyword search-low pressure The improved lateral rigidity reduces

The improved lateral rigidity reduces vibrations and noise during braking and also has improved heat resistance and increased stability

Front wheel support included

Recommended for both residential and commercial applications

for Schrader valve

Promax QR-1 Seatpost Clamp - 34.9mm QR Gold keyword search-low pressure The improved lateral rigidity reducesPromax QR 1 Quick Release Seatpost Clamp 34. 9mm Gold. 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 ounces in the 31. 8 size its as lightweight as it is tough. The head of the lever and the face of the clamp are given a proprietary low friction surface treatment that ensures smooth lever action