Ritchey P-650b Frameset

This is the second version of a 650b mountain bike from Ritchey -- Tom started to design his first in 1977. Even back then, Tom had a feeling that there was an advantage to the "middle" wheel size, but it took the rest of the cycling world three decades to figure it out: a 650b (or 27.5") wheel provides the bump-eating smoothness of a 29er, with the light, responsive feel of 26" wheels. Finally, the era of the 650b wheel is here.

The P-650b is a close relative to the P-29er. Up front there's the proprietary forged-and-machined, gram-shaving integrated head tube featured on all new Ritchey frames. Forged socket dropouts nd new chainstay-mounted rear disc brake mount save a few more grams.

And like every frame we make, geometry and tubing is carefully fine-tuned by Tom, to bring the legendary balanced, nimble Ritchey feel to 27.5" wheels.


  • Weight: 4.47lbs 
  • Fork: Designed for use with 100mm travel forks
  • Headset: The P-650b uses the Logic Zero WCS drop in 1-1/8” (41.8 Campy)
  • Front Derailleur: 28.6 clamp size
  • Bottom Bracket: 68mm English threaded
  • Bottom Bracket Drop: 50mm
  • Compatible with hydraulic brake systems only
  • Sold as frame only


Price $1,725.00
  • Ritchey P-650b Frameset
  • Ritchey P-650b Frameset
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