While an increased tyre size may mean more fun, this only holds true when wider tyres are paired with the correct width rims. Having a 2.8", or high-volume, tyre mated to a narrow rim makes for a squirmy, poor handling experience, and when you’re on the hunt for additional fun, these characteristics are undesirable. Lucky for you, the new age of traction, stability, and speed has arrived - and its name is the Traverse 38 SL Fattie 27.5.
Along with light overall weight, stiffness, and durability, another top priority for the Traverse SL was ease of use. The creaky straight-pull spokes and corrosion-prone alloy nipples have been discarded. Next up, Roval landed on 28 J-bend spokes, for front and rear wheels, that are all the same length, making it easy to find replacements if needed. A new hub design has also been engineered, with a wider profile and higher flange to aid in overall stiffness.
While the 38mm Traverse SL is already wider than most offerings, the benefits of three-inch tyres become more apparent with a proper rim interface. In search for the proper width, engineers tested various iterations, from 30 to 45 millimeters, to determine where the sweet spot lies. They ended up with a 38-millimeter internal rim width that turns the Traverse 38 SL Fatties into descending machines.
A wide internal rim width endows riders with a variety of advantages that are exemplified even more with plus-sized tyres. The extra width allows for more tyre volume, translating into more supple ride qualities, and better support for the tyre, meaning that you'll experience less "burping" when riding tubeless and a drastic increase in traction. After determining the proper rim width for the plus-sized application, a rim was designed that uses the same low-weight, high-strength technologies used in the Traverse SL and the Control SL. With this, Roval started with their Zero Bead Hook design that effectively eliminates the biggest weak spot found in traditional rims, and topped it off by using high-modulus carbon fibre to keep the weight down. To further this theme, the wheels also include the Roval tubeless plug system, which sheds an additional 50 grams-per-wheel compared to a rim strip.
Each Traverse 38 SL Fattie is hand-built to Roval's own alloy hubs with DT Swiss Competition Race spokes. Inside the hubs, you'll find sealed cartridge bearings all-around, and a quick-engaging 54t DT Swiss star ratchet system in the rear that allows you to power over rocks and roots without delay. While machines do a decent job of building wheels, professionally trained humans were chosen to build theirs, as they catch various flaws that a machine would otherwise miss.