Aluminum Alloy 34.9mm QuickRelease Seatpost Clamp Key benefits Secure seatpost retention: Designed to hold your seatpost firmly at the chosen height so you can ride with confidence. Lightweight and lowprofile: At about 45 g, the aluminumalloy construction adds minimal weight while remaining strong enough for everyday use. Longlasting finish: Anodized black surface resists fading and corrosion for consistent appearance and performance over time. Fast adjustments: Quickrelease lever makes raising or lowering the saddle faster and more convenient than a fixed clamp. Features and specifications Material: Aluminum alloy for a good strengthtoweight ratio. Weight: Approximately 45 g. Finish: Anodized black — attractive, corrosion resistant, and resistant to fading. Nominal size: 34.9 mm clamp. Compatibility: Fits frame seat tubes with outer diameters from 33.5 mm to 35.2 mm. Installation: Install the quickrelease lever on the seat tube and tighten the screws to secure the clamp. Why you need it Prevents seatpost movement during rides, improving comfort and pedaling efficiency. Simplifies height adjustments for different riders or changing terrain without compromising clamp strength. Durable finish and aluminum construction reduce maintenance and keep the clamp working reliably in varied conditions. Practical use scenarios Commuting: Quickly adjust saddle height for different routes or when sharing a bike at work or home. Group or family bikes: Swap saddle height between riders of different heights without tools taking extra time. Mixedterrain riding: Lower the saddle for technical descents and raise it for efficient pedaling on flats and climbs. What's included / installation note Quickrelease seatpost clamp assembly (nominal 34.9 mm). To install: place the clamp around the seat tube, fit the quickrelease lever, and tighten the screws until the clamp securely holds the seatpost. Check tightness periodically and after initial rides. Compatibility reminder Confirm your frame's outer seat tube diameter is between 33.5 mm and 35.2 mm before to ensure a proper fit.