Surly Ultra New Disc Front Hub – 135mm Spacing, Built for Strength and Precision

The Surly Ultra New Disc Front Hub is a beautifully engineered chunk of reliability — a forged aluminum body matched with Surly’s legendary durability and serviceability. Designed for fat bike forks with 135mm spacing and rear disc offset, this hub delivers the ideal combination of steering precision, low maintenance, and long-term performance.

Featuring a 6061-T6 forged hub shell (shared with the classic Surly New hub) and 6901 sealed cartridge bearings, it rolls smooth through the harshest conditions. The 4130 CroMoly axle and stainless steel cones add unmatched strength, while aggressive knurling on the cones and bolt caps helps lock everything solidly in place, minimizing slippage under torque or braking load.

Compatible with both quick release and bolt-on setups, the Ultra New Disc Hub keeps your build simple, strong, and versatile — perfect for riders who refuse to compromise between performance and dependability.

Key Features

• 135mm front hub – designed specifically for fat bike forks with rear disc offset

• Dual compatibility – works with both quick-release and bolt-on axles

• 6061-T6 forged aluminum shell – lightweight and exceptionally strong

• 6901 sealed bearings – smooth, durable, and easy to maintain

• 4130 CroMoly axle & stainless cones – ultimate rigidity and reliability

• Aggressive knurling – prevents slippage for consistent performance

Specifications

• Material: 6061-T6 forged aluminum hub shell

• Axle: 4130 CroMoly steel, QR/bolt-on compatible

• Bearings: 6901 sealed cartridge

• Spacing: 135mm

• Hub/Brake Compatibility: 6-bolt disc

• Color: Silver

• Designed For: Fat bike forks (rear disc offset)