Like the OPEN Unbeaten Path U.P., we’ve built up numerous OPEN One+ Frames into highly-customized dream bikes. Our first (and one of our absolute favorites) is Andy Kessler’s personal One+. If you’re unfamiliar with OPEN, Andy co-founded OPEN with famous Cervelo co-founder Gerard Vroomen. Both Andy and Gerard built independently-successful careers with some of the biggest names in the industry, so when the two got together to form OPEN, they created a new goal – build a small, dynamic company focused not on quantity, but on making a few models as good as possible. After the success of the OPEN O-1.0 (and sibling OPEN O-1.1), the brand added a new criteria to its list of design requirements – versatility. As OPEN was developing their new mountain bike frame, there began a shift in the bike industry toward wider and wider tires, and away from ultra-narrow race tires.
The OPEN One+ offers some of the very best tire clearance available – 2.4? wide tires on standard 29? wheels clear with ease (thanks to Boost hub spacing and highly-shaped tubing). But the real versatility comes in the form of clearance for Plus tires – 27.5? x 2.8? wide tires to be exact. The additional width and air volume gives a massive increase in traction and compliance to an otherwise race-ready platform. For those looking for the lively, snappy, and lightweight ride of a hardtail, the One+ checks all the boxes. For those who want the aforementioned ride but with extra stability and confidence in loose dirt, rocks, and sand (or anywhere else, for that matter), the One+ does that, too.