BEST FOR: Romping through the bike park.
THE TEST: Throughout our test, we liked the 650B wheel size best on all-mountain carbon-fiber bikes like the 5.9-inch Altitude: you get the rollover benefits of 29s but not the clumsiness. “It’s playful and jumpable like a 26er but so much more stable,” wrote one tester. The Altitude has a short cockpit and upright riding position, which translated to steady trail manners on descents, but it still managed to shimmy uphill fine, though the front end tended to wander a little.
THE VERDICT: It’s not as assertive as the Norco, but if you’re after an amusing all-mountain ride, the Altitude is worth a look. 28 lbs.