Surly Ultra New Mountain Bike Disc Fixed Hub 32H 135mm – Durable, Convertible

The Surly Ultra New Mountain Rear Disc Fixed hub represents a significant advancement in hub technology, combining proven durability with modern engineering enhancements. Crafted for mountain biking enthusiasts who prioritise reliability and ease of maintenance, this hub features a robust 6061 T6 forged and machined aluminium alloy shell with medium-height flanges. Its design supports a 135mm spacing and 32-hole configuration, ensuring compatibility with a wide range of mountain bike wheels. The Ultra New hub’s hollow axle facilitates seamless conversion between bolt-on and quick release setups, offering versatility for various riding and maintenance preferences.

Engineered with corrosion-resistant CroMoly steel axles and high-grade 10.9 stainless steel fixing bolts, the hub delivers exceptional strength and longevity. The inclusion of stainless steel bolt caps and heavily knurled cone nuts enhances wheel retention under high loads, maintaining axle stiffness and preventing slippage. Equipped with non-adjustable 6901 sealed bearings, the hub guarantees smooth, maintenance-free rotation, allowing riders to concentrate fully on performance. For those already using Surly New hubs, the Ultra New model supports straightforward upgrades through retrofit kits, ensuring modernisation without the need for complete wheel replacement. Explore more from Surly in our brand collection or browse similar products in our Bikes category.

Key Features & Benefits

• Versatile axle design: Hollow axle enables quick and easy conversion between bolt-on and quick release systems, enhancing adaptability.
• Robust materials: 6061 T6 forged aluminium alloy shell combined with CroMoly steel axles and stainless steel bolts ensures durability and corrosion resistance.
• Secure wheel retention: Knurled cone nuts and interlocking cones with dust caps maintain axle stiffness and prevent slippage under demanding conditions.
• Maintenance-free operation: Non-adjustable 6901 sealed bearings provide smooth rotation straight from the box, reducing upkeep requirements.
• Upgrade compatibility: Retrofit kits allow existing Surly New hub owners to modernise their hubs without replacing the entire wheel.

What It’s Good For

• Mountain bikers seeking a reliable, durable rear disc fixed hub with easy maintenance and conversion options.
• Riders who require a strong, corrosion-resistant hub capable of handling high loads and rough terrain.

What It’s NOT Good For

• Users needing adjustable bearing tension systems for fine-tuning hub performance.
• Those requiring compatibility with freewheel or non-fixed sprocket configurations.
• Applications outside mountain biking that demand different hub dimensions or specialised features.
• Riders prioritising ultra-lightweight carbon components over alloy hubs.

Frequently Asked Questions

Is this hub suitable for different rider sizes or preferences?
The Ultra New hub is designed to accommodate a range of rider setups through its adaptable axle system and standard 135mm spacing. Its compatibility with retrofit kits further supports varied configurations, making it suitable for multiple rider preferences and bike builds.

What key accessories or add-ons complement this model?
To enhance your riding experience, consider pairing the Ultra New hub with high-quality pedals, helmets, and lighting systems. Explore our pedals, helmets, and lights collections for compatible accessories that meet professional standards and ensure safety and performance on the trail.