Promax QR-1 Quick-Release Seatpost Clamp (31.8mm / For 27.2mm Seatposts)

Description

Effortless Saddle Adjustments & Dependable Clamping Power

Whether you are dialing in your perfect riding height for a steep climb, lowering your saddle for an technical descent, or letting a friend test-ride your bike, immediate adjustability is key. The Promax QR-1 Quick-Release Seatpost Clamp provides a smooth, tool-free locking mechanism that secures your seatpost firmly in place.

Cold-forged and CNC-machined from high-strength 6061-T6 aluminum alloy, this clamp offers premium structural durability without adding unnecessary bulk to your frame. Weighing in at an incredibly light 30 grams, it is built to handle the rigors of rugged trail riding and casual daily cruising alike.

Bushing-Free Smooth Lever Action: Unlike standard clamps that wear out or grind over time, the QR-1 features a proprietary low-friction surface treatment applied directly to the head of the lever and the face of the clamp. This specialized interface ensures silky-smooth, positive lever action for the life of the clamp without the need for plastic bushings that can crack or degrade.

Technical Sizing Note

• The 31.8mm Clamp Size is designed specifically to fit around the outside of frame seat tubes that house a 27.2mm seatpost. Always verify your frame’s outer seat tube measurement to guarantee a perfect slip-on fit.

Technical Highlights

• Tool-Free Quick Release: High-leverage, ergonomic lever makes adjusting your seat height a fast, painless process.

• 6061-T6 Aluminum Construction: Premium structural alloy delivers maximum clamping pressure without stripping or stretching under load.

• Stainless Steel Hardware: Outfitted with a premium stainless steel pivot pin and bolt to resist rust and environmental corrosion.

Specifications