Urban Velo

Broakland Fixed Hub Disc Adapter v2

I first spied the Broakland fixed hub disc adapter back in October ’09, and it generated a ton of comments in the post back then. The adapter is designed to mount a 6-bolt disc rotor on the fixed or freewheel threading of a double sided track hub without permanent modification, providing a solution for custom builds or retrofits of 120 mm rear spacing and disc brakes. Admittedly a rare frame configuration, they are nontheless out there with few compatible stock hub choices available. The adapter fits 1.37″ x 24 tpi track cog and freewheel threads and has a lockring tool notch in order to install and remove it even though you can effectively use the brake caliper and rotor as a removal tool as well. The Broakland adapter is available in either a $35 aluminum or $55 stainless version, with the fancy yet not strictly necessary reverse thread lockring another $35. Contact Montano Velo for purchase.


  1. ChampsMarch 22, 2012 at 2:08 pm

    “But you don’t need a rear brake, you have a fixed gear!”

    Seriously, though, you can always rock any SS MTB frame with a 135mm Surly hub, maybe others.

  2. cbleslieMarch 24, 2012 at 10:37 am

    Completely defeats the point of having a bolt on ISO cog.

  3. DanklnJuly 29, 2012 at 8:17 pm

    this is exactly what I wanted… and the comment thread with the 135mm Surly flip flop hub is the exact intended use… yay for a combined use mountain SS ready fixed/free wheel complete with quick lockring tool requiring interchangeability… god I love innovation!

  4. bmx sized bike with disc brakes - Page 2 - Observed Trials Bike ForumJanuary 14, 2013 at 6:49 am

    [...] just looking for solutions dude. Here's another one I saw similar. http://urbanvelo.org/broakland-fixed-hub-disc-adapter-v2/ Backwards force won't make a difference if you had it turned right of the opposite of the drive. [...]

  5. DJJuly 3, 2013 at 2:42 pm

    stoked that i can run a disk on my older White Industrie Eno hub, you will probably need the 4mm lock ring to space out the disk to line up with the brake caliper, job’s a good’un.

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