SURLY ULTRA NEW REAR FIX/FREE NON-DISC HUB

Surly California Proposition 65 

https://cambriabike.com/pages/warning-california-proposition-65

The Surly Ultra New Rear Hub is an upgrade to the original New hub, featuring a hollow axle design for easy quick-release conversion and high-strength stainless steel hardware. With its maintenance-free 6901 bearings, precision-machined 6061-T6 forged aluminum shell, and aggressive knurling on cones and bolt caps, this hub is built for durability, reliability, and performance on the road or track.

KEY FEATURES

• UPDATED AXLE SYSTEM: Hollow CroMoly axle with stainless 6mm bolts allows for quick-release or bolt-on compatibility.
• LOW MAINTENANCE: Runs on non-adjustable 6901 sealed bearings for smooth, reliable performance.
• STRONG & LIGHT HUB SHELL: 6061-T6 forged aluminum shell keeps weight low while maintaining strength.
• EXTRA GRIP: Heavily knurled cones and bolt caps prevent wheel slippage under high loads.
• EASY RETROFIT: All Ultra New hardware is compatible with the previous New hubs—upgrade kits available.
• FIX/FREE THREADING: Standard track/fixed-gear threading for single-speed setups.

SPECIFICATIONS

• HUB DRILLING: 32H
• AXLE TYPE: 10x1 bolt-on (Quick-release compatible, but skewer not included)
• CASSETTE BODY TYPE: Threaded Track / Standard Freewheel
• BEARINGS: 6901 sealed bearings (non-adjustable)
• HUB SHELL MATERIAL: 6061-T6 forged aluminum
• AXLE MATERIAL: 4130 CroMoly steel
• HUB SPACING: 130mm
• INCLUDED: Stainless 6mm bolts (Quick-release skewer NOT included)