Expand Radar Broakland Fixed Hub Disk Adapter October 6, 2009 Urban Velo has a post up on the shop Montano Velo‘s bike brand, Broakland. Perfect for a 120mm spaced track bike! Edit: I completely misread this post. The solution Broakland came up with was to run disk brakes on a 120 spaced track bike. This adapter allows you to do that on a standard track hub.