By Mike Cushionbury
Tom Ritchey built his first 27.5-inch wheeled off-road frameset in 1977 (which he called a 650b) as a personal bike. It never caught on at that time but now, 36 years later, the industry and many riders have begun to create demand for the in-between wheel size. Though most brands are looking towards longer travel, a few companies with roots in cross-country racing are utilizing the wheel size for that application as well.
Built from Ritchey’s classic heat-treated, triple-butted Logic 2 steel, the P-650b has new forged, socket-style dropouts and lightweight, chainstay-mounted disc brake tabs. The rest of the bike, including its iconic red, white and blue color scheme is a throwback to the past. The 68mm bottom bracket accepts English threaded cups (no BB30 here), seatpost size is standard 27.2, and the head tube is non-tapered at 1 1/8”. Our test bike came with a rigid, Ritchey-branded full carbon fork, though the geometry is adjusted to accept a 100mm travel suspension fork.
The parts build is just as cross-country specific, with a SRAM X0 2×10 drivetrain, alloy Ritchey Vantage 2 tubeless ready rims, WCS Shield tires and a carbon seatpost and handlebar. I was impressed with the ease in which the wheels were converted to tubeless and the quality of the wheelset in general on the trail.
I’ll admit, the P-650b was a bit of shock to my overly suspended system on our rougher east coast trails. Ritchey’s steel tubing remains one of the most refined and compelling materials for cross-country riding and racing, albeit with a weight penalty compared to carbon fiber, but this is still a fully rigid race bike no matter how nice the frame feels through the rough. I would have liked the addition of a suspension fork for some added comfort but for long, west coast fire roads and smooth singletrack this build will flat out fly.
After a few weeks with the P-650b I’ve developed a bit of an attachment to its old school charm. I’ve also realized just what type of rider will more fully appreciate everything the Ritchey has to offer.
Want to read the full, long-term review? Grab a copy of Issue #171 and check it out.
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