650b

Reynolds previewed their upcoming new carbon fiber 29er wheels at Sea Otter, built with 21mm-wide (internal width), tubeless-compatible rims

Sea Otter 2012: Reynolds’ new 650b and 29er wheels

Jeff Steber and his Tracer 27.5

Sea Otter 2012: Intense show Tracer 27.5 prototype

650B (27.5in) wheels are currently being positioned as best suited for trail bikes with 130- 50mm of travel

Video: SRAM, RockShox back 650B wheel size

FOX's new CTD-equipped forks feature a simplified interface to help even novice buyers eke out the most performance

FOX 2013: New CTD damper, 34 forks and more

Seven's 650b singlespeed mountain bike

Seven Cycles beat 650b drum

Scott-Swisspower conducted a rigorous test session back in December on all three common wheel size formats, concluding that 650b offered the perfect in-between performance envelope for this year's Olympic course.

Nino Schurter wins World Cup #1 on 650b wheels

Magura's new TS8 R 150 suspension fork

Magura offering 29er and 650B suspension forks

This is Joseph Ahearne's personal snow expedition bike.

NAHBS 2012 day 2 gallery: Ahearne to Hunter

Jamis's new Dakar XCR 29 Pro

Interbike 2011: New mountain bikes from Jamis