U-Brake compatible. Not compatible with either V-brakes or Cantilever brakes, as pads on U-brakes are below the mounting studs, and the aforementioned styles are reverse.
1-1/8" threadless, 6.5" long steerer
Hub compatibility: 9/16" - 14mm x 100mm. Requires a slotted axle with flats ground into it. Otherwise, buyer will have to grind down the fork dropout to accept a normal, round 9/16" axle