O’Leary Custom Built Mountain Bikes

O’Leary Custom Built Mountain Bikes are built for all day comfort and performance – in the dirt. Currently all frames are 100%  fillet brazed, using a 44 millimeter headtube, and 73 millimeter standard English threaded bottom bracket. Drop-outs come in a variety of styles but typically we use thru-axle styles. The geometry of our mountain bikes are tuned to the rider’s preferences and use a range of 67-71.5 degree head tube angles and 72-74 degree seat tube angles. O’Leary mountain bikes utilize years of off road designs with attention to modern advancements in front suspension, disk brakes, dropper-seat posts, tire designs and drivetrains. Currently we are building our steel bikes with tubes primarily from Columbus and Dedaccai bicycle tubing companies – along with USA made steel tubes from Vari-Wall.

  • Hand-built, steel bicycle frames
  • 44 mm head tube – or tapered options
  • Paragon Machine Works dropouts and others