Dialing in your fit is one of the key steps in maximizing both your comfort and performance on the bike. The Size-O-Matic II is the best tool on the market for doing just that. Whether used in shop fitting sessions or down in the basement workshop during a late night wrench-fest, the Size-O-Matic II delivers a simple, quick, and precise way to find a rider’s desired stem reach and rise. NOT FOR RIDING USE.

  • Not for riding, sizing only!
  • Compatible with 25.4, 26.0, and 31.8mm handlebars
  • Hinged handlebar clamp with a captured fixing bolt. No more loose bolts to remove, drop or lose
  • 55–155mm range of reach adjustability
  • -20° to +40° rise adjustability
  • Fully compatible with uncut fork steerer tubes
  • Deluxe injection molded plastic storage case

Size-O-Matic II Instructions

Customer Reviews/Q&A