Box One Fixed Seat Clamp 31.8mm

Product Overview

The Box One Fixed Seat Clamp is a lightweight seat post clamp designed for BMX frames with 31.8mm seat tubes. Cold forged and CNC machined from 6061-T6 aluminum, it provides secure seat post retention at minimal weight. Features titanium hardware for corrosion resistance and weight reduction.

Key Features

• Cold forged construction – Forging process compresses aluminum grain structure for increased strength compared to standard cast or extruded clamps

• CNC machined finish – Precision machining ensures consistent clamping diameter and smooth surfaces for reliable seat post grip without slippage

• 6061-T6 aluminum body – Heat-treated aluminum alloy balances strength and light weight for durable clamping performance

• Titanium hardware – Titanium bolt resists corrosion and reduces overall clamp weight compared to steel fasteners

• Laser-etched graphics – Permanent branding applied via laser etching won't wear off from use or cleaning

Technical Specifications

• Weight: 7 g
• Material: 6061-T6 aluminum (body), titanium (bolt)
• Seat tube diameter: 31.8mm
• Clamp type: Standard round
• Finish: Anodized aluminum
• Hardware: Titanium bolt

Compatibility and Ideal Use Cases

Designed for BMX frames with 31.8mm round seat tubes. Fits standard seat posts when frame seat tube measures 31.8mm outer diameter at the clamp interface. Best suited for riders seeking minimal weight and clean aesthetics without compromising seat post security. Works with all seat post materials (aluminum, chromoly, carbon) when properly torqued. Not compatible with integrated seat clamps or frames requiring alternate clamp diameters—verify frame seat tube measurement before ordering.

Note: US orders ship direct from manufacturer and may arrive separately from other items.