Surly Hubs on The Fixed Gear Gallery of Bikes

Surly Hubs and Fixed Bike News

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The Basics of Surly Hubs

Surly hubs are made from aluminum and have medium height flanges, and spin on high load. They are perfectly sealed and also have adjustable cartridge bearings over standard sized axles (9x1mm front, 10x1mm rear). This size is a very standard size, so don’t worry about not finding replacements. They’re out there if you want to change out axles. The reason Surly hubs have adjustable bearins is so you can adjust play as they wear – no need to worry about replacing them all the time.

Surly Hub Fitting
Surly hubs are spaced spaced 100mm (in the front) so they can fit just about any forks. They’re spaced a bit differently for the rear and come in a few widths. The Surly hub widths are: 120, 130, and 135mm.
Surly Hub Variations
Surly offers a few variations of their hubs to satisfy different types of riders. A number of the hubs offered by Surly are disc with singlespeed freewheel threading. The threading comes either on the drive side, but Surly does offer some that have freewheel threading on both sides (English 1.37x24tpi). In the fixed gear range, they have FW threads on one side and fixed gear/lockring threads on the other (1.37x24tpi and 1.29x24tpi LH respectively). As far as colors go, they come in either silver or black. And for holes, Surly has 32-holes as well as some 36.

Surly Hub Specs

Front Disc & Non Disc (100mm spacing):

Silver, 32h, solid axle
Black, 32h, solid
Black, 32h, QR
Silver, 36h, solid

Old

old

FRONT (100mm spacing)
flange diameter (L or R): 43mm
(C-T-F) center of hub flange (L or R): 33mm

New

FRONT (100mm spacing)
flange diameter (L or R): 54mm
C-T-F (L or R): 32.2mm

FRONT DISC (100mm spacing)
flange diameter (L or R): 58mm
C-T-F (left/disc side): 22.5mm
C-T-F (right/drive side):32mm

Rear, 120mm (track spacing). No disc option:

Silver, 32h, solid, fixed gear/lockring both sides
Black, 32h, solid, fix/fix
Black, 32h, solid, fix/free
Silver, 36h, solid, fix/fix
Silver, 32h, solid, fixed gear/lockring one side, single-speed freewheel
threads the other

REAR TRACK (120mm spacing)
Dual fixed gear threading
flange diameter (L or R): 54mm
C-T-F (L or R): 30mm

REAR TRACK (120mm spacing)
Fixed threading/freewheel threading
flange diameter (L or R): 54mm
C-T-F (fixed gear side): 31mm
C-T-F (freewheel side): 30mm

Rear, 130mm (road spacing). No disc option:

Black, 32h, solid, fix/free
Silver, 32h, solid, fix/free

REAR ROAD BIKE (130mm spacing)
Fixed threading/freewheel threading
flange diameter (L or R): 54mm
C-T-F (fixed gear side): 33mm
C-T-F (freewheel side): 31.5mm

Rear Non Disc, 135mm (MTB spacing):

Silver, 32h, solid, free/free
Silver, 32h, solid, fix/free
Black, 32h, solid, free/free
Black, 32h, solid, fix/free
Black, 32h, QR, free/free
Silver. 36h, solid, free/free

REAR MOUNTAIN BIKE (135mm spacing)
Dual freewheel threads
flange diameter (L or R): 54mm
C-T-F (L or R): 38.5mm

REAR MOUNTAIN BIKE (135mm spacing)
Fixed threading/freewheel threading
flange diameter (L or R): 54mm
C-T-F (fixed gear side): 37.5mm
C-T-F (freewheel side): 38.5mm

Rear Disc (135mm spacing only):

Silver, 32h, solid axle
Black, 32h, solid
Black, 32h, QR
Black, 36h, solid

REAR DISC MOUNTAIN BIKE (135mm spacing)
Freewheel threading
flange diameter (L or R): 58mm
C-T-F (left/disc side): 34mm
C-T-F (right/drive side): 38.5mm