Surly  2010 New hub (rear, disk MTB)

The first thing you should know, if you don’t already, is that we don’t offer hubs designed for gear clusters. Those kinds of hubs are cool, with their ½-step ratcheted multi-pawl systems and sealed mechanism freehub bodies and all that. In comparison, our hubs are simpler. While we produce frames that can take gears, our hearts still lie deep in the singlespeed jungle, because of the simplicity, effectiveness, ease of maintenance, and default pragmatism singlespeeds offer. Do what you love, that’s what we say.

All our hubs sport what we would call ‘medium’ flange height, and they spin on fully sealed adjustable cartridge bearings. We use adjustable bearings so you can take out the play that develops over time as they wear. All of our hubs use steel axles and hardened steel hardware, and the axle threading is a popular standard, so that it will still be easy to find replacements should the need arise.

So you might think “Geez, singlespeed hubs only? Man, that doesn’t leave a lot of options.” You’d be wrong. You’ve got your disc or no-disc option, 32-or 36-hole option, color option, solid vs. hollow axle option, and gear threading option (singlespeed freewheel or fixed-gear cog and lockring). Combine that with four over-locknut-dimensions (OLD) and you’ve got all kinds of options. You know, as long as you want a singlespeed hub.

Bearings:
7901 Enduro Max angular contact, full complement, adjustable cartridge

Fixed Cog Threading:
English 1.37 x 24tpi

Lockring Threading:
1.29" x 24tpi LH

Axle Threading:
10 x 1mm all rears

Please note: Fixed cogs and English threaded SS freewheels use the same size threads. Fixedgear hubs have a second set of smaller diameter, reverse direction threads outboard of the cog threads. Surly does not endorse the use of fixed-gear cogs of any kind without the use of a properly installed lockring. We know some jerk on MTBR.com said he did it and ain’t been hurt yet, but lockrings are important. You have been warned. If you hurt yourself because you didn’t use one, you deserve what you get.

Rear Disc, 135mm (MTB spacing):
Silver, 32h, solid axle, freewheel threading
Black, 32h, solid, freewheel
Black, 32h, quick-release, freewheel
Silver, 36h, solid, freewheel
Black, 32h, solid, fixed-gear threading