Fixed Gear Mountain Bike Parts

Fixed gear off-road mountain biking is not practical, but it’s a blast! No coasting allowed.

It provides a whole new set of challenges when biking as the pedals are always in motion. In addition, full concentration is always required. Think about pausing for a second and there will be a sudden reminder to keep on pedalling.

Too much fun to be had as bunny hills, switch backs, and logs can become technically challenging. In addition, going down a hill is suddenly just as challenging as climbing a hill. It’s like learning to bike again as a whole new set of cycling techniques need to be learned.

The fixed experience is also very different from singlespeed bikes, as the cyclist is always connected with the terrain. A mountain biker’s pace can be controlled simply by pedalling faster or slower.

  • Note, having front brakes is absolutely necessary off-road. It’s suicide without them!

When experimenting with fixed gear off-road mountain biking there was very little information available. It is/was a very small niche as none of the local cyclist bike fixed gear off-road. In addition, the local bike shops were not familiar with the sport either. As a result, it became a custom job as parts had to be researched and special ordered.

In short, mountain bikes can be converted to fixed gears either by attaching a bolt-on disc cog, or by building a rear wheel with a fixed rear hub with mountain bike spacing (135 mm O.L.D). Chain tensioners cannot be used as they will break under pressure when reverse pedalling.

Unfortunately, most solutions require a MTB frame with horizontal dropouts or track forkends. However, MTB frames with vertical dropouts can be converted with a rear wheel built around an elliptical axle hub (i.e. White Industries Eccentric ENO).

Anyway, below is a list of fixed gear parts for off-road mountain biking.

The following were composed on August 24, 2013.


Bolt-on Disc Cogs

The following list bolt-on disc cogs.

They are the cheapest and easiest solution to convert a mountain bike with horizontal dropouts or track forkends into a fixed gear bike.

Bolt-on disc cogs are drilled to have a 6-bolt ISO disc pattern. They are installed by mounting them onto a disc hub. The rear wheel is then flipped and remounted onto the bike frame with the chain on the cog. However, this results in the loss of rear disc brakes.

  • Note, an alternative do-it-yourself solution to the following cogs, is to drill a 6-bolt ISO disc pattern into a singlespeed cog with a bench press drill
Manufacturer Model
Phil Wood & Co. Rear ISO Bolt Pattern Cogs, 1/8”
Problem Solvers Problem Solvers 6-bolt Cog
TomiCOG TomiCOG, 3/32”
VeloSolo VeloSolo Bolt-on Disc Cog, 3/32”
VeloSolo Bolt-on Disc Cog, 1/8”

MTB Hubs

The following list rear fixed gear hubs with 135mm O.L.D. spacing for mountain bikes. There are only 5 models listed, but they come in many variations.

The White Industries Eric’s Eccentric ENO is the only fixed gear hub designed for use with vertical dropouts as it uses an elliptical axle. However, it is a flip-flop hub and rear disc brakes cannot be used.

For disc brakes, there are more options, but the hubs are designed for horizontal dropouts or track forkends.

Manufacturer Model
Paul Components Disk WORD, 135mm O.L.D., 32h, Fixed Gear, Black
Disk WORD, 135mm O.L.D., 32h, Fixed Gear, High Polish
Disk WORD, 135mm O.L.D., 32h, Fixed Gear, Orange
Disk WORD, 135mm O.L.D., 32h, Fixed Gear, Silver
Disk WORD, 135mm O.L.D., 36h, Fixed Gear, Black
Disk WORD, 135mm O.L.D., 36h, Fixed Gear, High Polish
Disk WORD, 135mm O.L.D., 36h, Fixed Gear, Orange
Disk WORD, 135mm O.L.D., 36h, Fixed Gear, Silver
Phil Wood & Co. KISS-Off Mountain Bike Hubs, 32h,fixed gear
KISS-Off Mountain Bike Hubs, 32h,fixed-freewheel
KISS-Off Mountain Bike Hubs, 32h,fixed gear with disc brake (ISO)
KISS-Off Mountain Bike Hubs, 36h,fixed gear
KISS-Off Mountain Bike Hubs, 36h,fixed-freewheel
KISS-Off Mountain Bike Hubs, 36h,fixed gear with disc brake (ISO)
Surly New model Hubs – Rear Non Disc, 135mm O.L.D, Silver, 32h, solid, fix/free
New Model Hubs – Rear Non Disc, 135mm O.L.D, Black, 32h, solid, fix/free
New Model Hubs – Rear Non Disc, 135mm O.L.D, Black, 48h, solid, fix/fix
New Model Hubs – Rear Disc, 135mm O.L.D., Black, 32h, solid, fixed gear/lockring threading
Ultra New Hubs – REAR NON-DISC, 135MM, Silver 32h 135mm O.L.D. Fix/Free
Ultra New Hubs – REAR NON-DISC, 135MM, Black 32h 135mm O.L.D. Fix/Free
Ultra New Hubs – REAR NON-DISC, 135MM, Black 48h 135mm O.L.D. Fix/Fix
Ultra New Hubs – REAR DISC, 135MM, Black 32h 135mm O.L.D. Fixed
White Industries Eric’s Eccentric ENO Flip Flop Hub, 135mm O.L.D., fix/free

Lockrings

The following list lockrings, which are used to prevent track cogs from unthreading from a hub. Most are designed for English lockring threads (1.29×24tpi left-hand).

Manufacturer Model
All-City Cycles Standard Lockring
Stainless Lockring
Dimension Basic Track Cog Lockring
Gusset Bikes Fixed Lockring
Halo Fixed Cog Lockring
Black Fixed Cog Lockring
Blue Fixed Cog Lockring
Gold Fixed Cog Lockring
Green Fixed Cog Lockring
Red Fixed Cog Lockring
Purple Fixed Cog Lockring
Miche Lock Ring
Paul Components Wide Lock Ring
Profile Racing Profile Fixed English/ISO Lockring
Shimano Dura-Ace Lockring
Singleworks Track Lockring
SOMA Fabrications Track Lockring
Surly Fixed Cog Lockring

Track Cogs

The following list track cogs for fixed gear use. Any regular fixed gear cog will work for off-road mountain biking use.

Standard track cogs are designed for ISO-threaded (1.375” x 24tpi) hubs.

White Industries uses a custom spline pattern.

  • Miche track cogs, require a special carrier (housing)
  • Singleworks website is coming soon
  • Sugino track cogs include a special carrier and lockring
  • Surly Dingle Cogs are unique as they offer two cogs (17/19T, 17/20T or 17/21T) within the width of a single track cog
Manufacturer Model
All-City Cycles Standard Cogs, 1/8”
Stainless Cogs, 1/8”
Gusset Bikes Track Cogs, Black, 3/32”
Halo Fixed Cogs, Black, 1/8”
Fixed Cogs, Chrome, 1/8”
Miche Pista Sprocket Housing
Pista Alloy Sprocket, 3/32”
Pista Alloy Sprocket, 1/8”
Pista Sprocket, 3/32”
Pista Sprocket, 1/8”
Pista steel Sprocket & Housing, 3/32”
Pista steel Sprocket & Housing, 1/8”
Phil Wood & Co. Rohloff Cogs, 1/8”
Splined Cogs, 1/8”
Track Cogs, 3/32”
Track Cogs, 1/8”
Profile Racing Fixed Cogs, 3/32”
Fixed Cogs, 1/8”
Q2 Bike Parts Track Cogs, 1/8”
Shimano Dura-Ace Track Cogs, 3/32”
Dura-Ace Track Cogs, 1/8”
Singleworks Cromo Track Cog, 3/32”
Cromo Track Cog, 1/8”
SOMA Fabrications Track Cogs in Chrome, 3/32”
Track Cogs in Chrome, 1/8”
Track Cogs in Phosphate Black, 3/32”
Track Cogs in Phosphate Black, 1/8”
Sugino Fixie Cogs
Black, 1/8”
Blue, 1/8”
Gold, 1/8”
Red, 1/8”
Silver, 1/8”
Surly Dingle Cogs, 3/32”
Fixed Cogs, 3/32”
Fixed Cogs, 1/8”
White Industries Splined Cogs, 3/32”
Splined Cogs, 1/8”

Photos

Fixed Gear Mountain Bike Parts-01-thumb.jpgFixed Gear Mountain Bike Parts-02-thumb.jpgFixed Gear Mountain Bike Parts-03-thumb.jpgFixed Gear Mountain Bike Parts-04-thumb.jpg


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