Surly Ultra New Rear Hub, Fix/Free, 120mm or 130mm Bolt-On, 9mm QR, 32H
Surly’s Ultra New Rear Hubs are built for riders who demand flexibility and durability in their singlespeed or fixed-gear setup. These flip-flop hubs feature fixed threading on one side and freewheel threading on the other, letting you choose your ride style. Sealed cartridge bearings and a sturdy aluminum shell ensure low maintenance and long-term reliability. Available in both 120mm and 130mm rear spacing, they’re compatible with a range of frames—perfect for urban riders, commuters, or minimalist tourers.
Specs (applies to both versions):
Axle Type: 9mm solid axle (bolt-on)
Axle Fixing: Bolt-on (QR-style bolts, not quick release skewer)
Drivetrain: Fixed/free flip-flop threading (fixed cog with lockring on one side, freewheel thread on the other)
Hole Count: 32 holes
Brake Compatibility: Rim brake only
Bearings: Sealed cartridge bearings
Material: Aluminum shell with stainless hardware
Colors: Black
Rear Spacing Options:
120mm: Ideal for track, singlespeed, or older road frames
130mm: Fits modern road frames with wider spacing