OPEN CYCLES O-1.0 29er HARDTAIL MTB
The visual experience of this bike is worth marveling at without a doubt, but the factor of which you’re viewing one of the most technologically advanced carbon 29er mountain bikes in the cross country spectrum, sets it over the top. The team of designers with the company OPEN created some difficult goals to out perform any of the carbon hardtail rides currently on the market. Their result ended up being the prestigious O-1.0 model.
They began the mountain bike process at the core, with the actual carbon fiber itself. Most builders believe that the more ‘high-modulus’ composite material you use to construct with, the better. But its become well known that the stiffer high-modulus composite is a bit more brittle making it a little weaker. So they utilized it only where it made engineering sense on the O-1.0 frame, they then blended the stronger composite where it was needed, for example in the tapered head tube and bottom bracket areas. This approach netted OPEN one of the lightest mtb designs to date, at 900 grams which also passed the most rigorous German structural integrity testing available.
OPEN’s other big motivational goal was to produce their carbon 29er to have that total compliant feel for the rougher trail sections. Visually if you check out the side profile of the hardtail, it’s very apparent how the design of the tubing gets smaller from the front head tube area to its rear seat stays that are nice and thin, giving it vertical flex in the seat stays only to add a little comfort without a sacrifice to the lateral rigidity for pedaling or off-camber sections of trail.
In the twenty niner geometry department for the O-1.0, the goal was a nimble feeling ride. So they worked in some shorter 17.3 inch chain stays to make it feel agile, along with a steeper 72° head angle. They also made the seat tube angle a slacker 72.5° setup, so that you can utilize a zero setback style seat post to save yourself some weight by not having to use a set back style post.
Full internal cable routing has been designed to get that clean modern appearance. Everything is routed through a single multi-cable stop integrated into the layup design. Nicely done Open, if we must say so!
OPEN have also integrated the BB right style bottom bracket design which is technology the Cervelo road models use. The style uses the same 30 millimeter spindle used with the BB30 systems. For the U.S. market the Open Frame will come decked out with a Rotor 3D+ crankset that has a 38 X 24 tooth chain ring set which seems about perfect for most rides.
Several other nice design touches on the O-1.0 are the location of the rear brake caliper mounting post on the chain stay to make it stronger with less flex, and the use of a direct mount S3 front derailleur so its not necessary to use a clamping style front mechanical that can be over tightened and cause damage to the tubing. And some other forward mountain thinking by including what Open Cycles term as a Saver style rear derailleur hanger, it’s bolted the opposite from the norm, locating the actual threads of the mounting bolt in the hanger rather than the rear dropout itself.
The new O-1.0 mtb model will accommodate 2.25″ width tires. The color available is JET Stealth Black with sizes ranging from Small up to X-Large. The Open O-1.0 Price and specifications for both frame and complete bike are available at the link below… and come with