BOX ONE PRO 108MM BRAKE CALIPER

Product Overview

The Box One Pro 108mm Brake Caliper is a long-reach V-brake designed for BMX and other bikes using linear-pull brake systems. Cold-forged and CNC-machined from 6061-T6 aluminum with sealed bearing pivots, this brake provides powerful, precise rim braking with 35mm of vertical pad adjustment range. The 108mm arm length delivers strong mechanical advantage for reliable stopping power.

Key Features

• Cold-forged construction – Cold-forging process produces maximum strength and stiffness while minimizing weight compared to cast or machined-only designs
• 6061-T6 aluminum – Heat-treated aluminum alloy provides durability and corrosion resistance
• Sealed bearing pivots – Precision sealed bearings at pivot points ensure smooth, consistent brake arm movement while resisting dirt and moisture
• 35mm vertical pad adjustment – Extensive adjustment range accommodates different rim widths and allows precise pad positioning
• 108mm arm length – Long-reach design provides strong mechanical advantage for powerful braking and accommodates wider tires
• Premium hardware – Titanium and stainless steel fasteners resist corrosion and reduce weight
• Flexible cable noodle – Allows optimized cable routing angle for smooth cable action
• Streamlined cable anchor – Simplified cable fixing point makes cable installation and adjustment easier

Technical Specifications

• Brake type: V-brake (linear-pull)
• Arm length: 108mm (long-reach)
• Material: 6061-T6 aluminum, cold-forged and CNC-machined
• Pivot bearings: Sealed precision bearings
• Pad adjustment range: 35mm vertical
• Hardware: Titanium and stainless steel
• Weight: 198g (7 oz) per brake
• Brake size: Pro (108mm arm)
• Lever compatibility: Linear-pull brake levers (V-brake levers)

Compatibility and Ideal Use Cases

This brake fits frames and forks with V-brake/linear-pull brake bosses—two threaded posts spaced vertically on each side of the wheel. The 108mm arm length requires linear-pull (V-brake) levers, not cantilever or road brake levers, as the cable pull ratio differs. Not compatible with disc brake mounts or cantilever brake posts. Verify your frame has V-brake bosses and you have V-brake levers before ordering.

Best suited for BMX riders, mountain bikers, and urban cyclists who want premium rim braking performance with long-reach capability. The 108mm arm length provides strong braking power and accommodates wider tires (up to approximately 2.3-2.5" depending on frame clearance). The sealed bearing pivots ensure consistent brake feel and reduce maintenance compared to bushing-based brakes. The 35mm pad adjustment range allows compatibility with various rim widths and provides flexibility for precise setup. Ideal for BMX racing, dirt jumping, mountain biking, city commuting, or tandem bikes where reliable, powerful rim braking is needed. The cold-forged construction and premium hardware suit riders who prioritize performance and durability. Important: V-brakes require proper cable and lever setup—ensure your brake lever is designed for V-brakes (linear-pull) for correct mechanical advantage. When installing, adjust pad toe-in (front edge slightly closer to rim) to reduce squeal and improve modulation. Check brake pad alignment regularly to ensure pads contact the rim surface without touching the tire. Not compatible with carbon rims unless using carbon-specific brake pads.