Box Three Pro Disc Rear 10mm 36H Hub Black

Product Overview The Box Three Pro Disc is an affordable yet feature-rich 36-hole rear disc hub engineered for BMX racers seeking reliable performance with modern disc-brake integration. The 120-tooth engagement system with 3-pawl design delivers crisp power transfer and immediate acceleration. Precision sealed bearings and cold-forged aluminum construction provide durability across racing and training. Available with or without 6-bolt rotor. Includes lock ring, cassette spacer, and 16T cog for complete rear wheel readiness.

Key Features

• 120-Tooth Engagement System – High-ratchet count provides immediate engagement with minimal freewheeling lag; delivers responsive power transfer during gate starts
• 3-Pawl Design – Three-pawl engagement system ensures reliable ratcheting; optimized for rear wheel power transmission
• 6-Bolt Disc Rotor Compatible – Engineered for modern 6-bolt rotor standards; enables integration with hydraulic or mechanical disc-brake systems
• Precision Sealed Bearings – Sealed cartridge bearings eliminate water and dirt ingress; reduce maintenance and extend hub life
• 6061-T6 Aluminum Hubshell – Lightweight yet durable aluminum resists corrosion; maintains strength without adding excess weight
• Chromoly Steel Driver – Cr-Mo construction resists bending and cracking; provides superior strength for competitive racing
• CNC-Machined Components – Precision machining ensures exact tolerances and perfect bearing alignment; reduces play and maximizes smooth operation
• Included Components – Lock ring, cassette spacer, and 16T cog included; ready for immediate wheel building without additional purchases
• Available With or Without Rotor – Flexibility to purchase hub alone or complete with 6-bolt rotor; customize based on setup needs
• Anodized Finish – Protective coating resists corrosion; maintains clean aesthetic through extended use

Technical Specifications

• Wheel Position: Rear
• Spoke Holes: 36
• Hubshell Material: 6061-T6 Aluminum
• Driver Material: Chromoly steel
• Engagement System: 3-pawl on 120-tooth ratchet
• Bearings: Sealed cartridge (2 per side)
• Disc Rotor Compatibility: 6-bolt standard
• Axle Size: 10mm
• Freehub Body: HG (Shimano-standard cassette compatible)
• Finish: Anodized
• Weight: 444g with 6-bolt rotor
• Rotor Included: Optional (specify with or without)
• Included Components: Lock ring, cassette spacer, 16T cog
• Hardware: Steel bolts and caps

Included Components

• Lock Ring – Secures cog to hub; prevents cog rotation during hard acceleration
• Cassette Spacer – Optimizes cog seating and spacing for proper lock ring clamping
• 16T Cog – Standard rear cog included; enables immediate wheel building without separate cog purchase

Compatibility and Ideal Use Cases

• Fits: 36-hole rear wheel builds on BMX frames with 3/8" (10mm) bolt dropouts; disc-brake equipped frames
• Cog Compatibility: HG freehub body accepts any Shimano-standard cassette cog (16T, 17T, 18T, etc.); upgrade or swap cogs as needed
• Rotor Compatibility: Any 6-bolt rotor; standard size for modern BMX disc brakes
• Best For: Budget-conscious BMX racers with disc-brake bikes; riders seeking reliable engagement and responsive rear-wheel performance
• Ideal Riders: All skill levels; competitive racers on a budget; riders prioritizing disc-brake integration on rear wheel
• Wheel Building: Requires 36-hole rim, spokes, and nipples to complete rear wheel assembly; included components enable immediate assembly

Rotor Options

• With Rotor: Complete 444g package includes 6-bolt rotor; ready for immediate disc-brake integration
• Without Rotor: Hub only; allows selection of preferred rotor separately for weight or performance optimization

Performance Notes The 120-tooth engagement system delivers crisp, responsive power transfer essential for competitive gate-start racing. Three-pawl design provides reliable engagement through extended riding and racing sessions. Included 16T cog and lock ring enable immediate wheel assembly without additional component purchases.

Durability and Value Chromoly driver and aluminum hubshell provide excellent strength-to-weight ratio at affordable price point. Sealed bearings require no regular maintenance. CNC-machined components ensure precision tolerances and long-term reliability across racing and training use. Included components represent significant value—standard retail of lock ring, spacer, and cog adds substantial savings.

Maintenance Notes Sealed bearings need no regular servicing; hub lifespan extends across multiple racing seasons with minimal care. Check bearing play periodically; smooth rotation without wobble indicates proper function. Included lock ring and spacer are serviceable components; replacements available separately if needed.

Weight and Performance At 444g with rotor, the Box Three Pro Disc remains competitive in weight for racing applications. Three-pawl 120-tooth engagement delivers immediate power transfer without excessive rotational mass. Complete package with included cog, lock ring, and spacer enables quick wheel assembly and testing.