BOX ONE ALLOY BMX RIMS

The Box One 20” Pro Rim is engineered for BMX racers looking for the perfect balance of low weight, stiffness, and durability. Featuring a double-wall, eyeleted construction with a low-profile design, these rims are optimized for modern race builds while maintaining the strength required for elite-level competition.

Available in both brake and brake-less configurations, riders can build lighter, cleaner wheelsets without unnecessary brake tracks where they aren’t needed.

Features

• Lightweight double-wall 6061-T6 aluminum construction
• Low-profile design for reduced rotational weight
• Optimized internal geometry for increased strength and stiffness
• Stainless steel eyelets for improved spoke load distribution
• Pinned joint construction
• Matte black anodized finish with Box One graphics
• Available in brake and brake-less versions

Important Notes

• Brake-less rims do not feature a machined brake track and are not compatible with rim brakes.
• Brake-less versions are intended for front wheel use or rear wheel use with disc brakes only.

Specifications

• Material: 6061-T6 Aluminum
• Construction: Extruded & Rolled
• Hole Count: 36H
• Joint: Pinned
• Valve Hole: Schrader
• Eyelets: Stainless Steel
• Finish: Matte Black Anodized with Decals
• Tubeless Compatible: No
• Tire Compatibility: 20 x 1.50” to 1.95”
• ISO (ETRTO): 451

Dimensions

Front Rim
• External Width: 28 mm
• Internal Width: 22.5 mm
• ERD: 391 mm
• Weight: 295 g (10.4 oz)

Rear Rim
• External Width: 28 mm
• Internal Width: 22.5 mm
• ERD: 394 mm
• Weight: 362 g (12.7 oz)

Recommended Spoke Tension

• 110–115 kgf

Popular Compatibility

• Box One X2 Pro Carbon 20” Fork (20 mm)
• Box One Quantum Hubset 36H
• Box Two 20 mm Front Hub 36H
• Box Two 20 mm Freewheel Hubset 36H
• Box Three Pro 10 mm Rear Disc Hub 36H

FAQ

Q: What spoke tension is recommended?
A: Box recommends a spoke tension between 110 and 115 kgf. Final tension may vary slightly depending on wheel build and components used.

Q: What lacing pattern should I use?
A: The ideal lacing pattern depends on rider size, hub choice, spoke type, and intended use. Consult your wheel builder for recommendations.

Q: What spoke length do I need?
A: Spoke length varies based on hub dimensions, lacing pattern, and rim selection. We recommend using a spoke calculator or consulting a professional wheel builder before ordering spokes.