Those seeking the challenge of drop-bar riding over more technical terrain that is typically frequented by mountain bikes will benefit from the additional air volume, durability, and anti-flat performance benefits provided by the G27.If your path leads you to rough roads, single tracks, and multi-day bike packing adventures – the G27 may be for you.

There is a place between road and mountain open to discovery. Beyond the range of your trail bike or the capabilities of your road bike. Terrain littered with contradicting challenges and demanding requirements are at odds with the bikes and products available today. We built the new G27 to thrive in this new environment because insight gained through building the world’s best road and mountain bike rims told us that the perfect combination did not exist in our stable, or in our opinion, anywhere at all. The higher volume and lower pressures would demand MTB toughness and flat resistance, while big days and long miles would require the lightweight and efficiency of a road machine. Above all, the combination of rough and rigid would require a wheel with the ride quality to make those long miles enjoyable and multi-day trek possible.

We want people to have as much fun riding gravel as we do and for that reason we’ve targeted rim geometries that favor the tire treads and volumes that have proven to be the most fun. With an inner rim width of 27mm the G27, is designed to be paired with 650B gravel and road plus treads from 42mm-60mm and 27.5 XC mountain treads from 1.9”-2.25”. These light casing, supple tires provide ample control and traction, for most gravel riding endeavors, but they do not offer much by way of pinch-flat protection. Despite ‘min PSI’ markings to the contrary, many riders are experimenting with pressure setting in the 20s. The forward-looking G27 is ahead of the trend using our Wide Hookless Bead anti-flat technology, which provides a larger, more forgiving surface during bottom outs, protecting the tire from the dreaded pinch-flat. This technology means you can ride the tire pressures you want, confidently, without limitations. The G Series are intended for tubeless applications and features a molded bead-lock to ensure that your tires will remain secure and sealed to the rim over even the roughest terrain.

SES G Series wheelsets feature a straight sidewall/hookless bead design to ensure best in class tubeless tire performance and are qualified for use with “Tubeless, Tubeless Ready (TLR)” tires, with a labeled width of 28c or greater ONLY. One may safely run inner-tubes as long as the tire itself is of a tubeless or tubeless ready construction.

Please note that the internal rim width of the G23 is 23mm and intended for use with tubeless ready tires between 32-45mm with 40mm tires being the primary focus of the design. The G27 features a 27mm internal width that is intended for pairing with tires between 42-60mm with 55mm/2.0” tires being the target tire width for this rim.

Due to the straight sidewall/hookless design of this rim and inherent high volume design, it is important to understand that not all tires are created equal and for that reason one should pay special attention to the pressure ratings of both the tire and the rim.

G23 – MAX PRESSURE FOR A 32MM TIRE = 60psi/4.1bar

G27 – MAX PRESSURE FOR A 42MM TIRE = 40psi/2.75bar

IN THE CASE THAT TIRE AND RIM MAX PRESSURES ARE DIFFERENT. THE LOWER OF THE TWO PRESSURES BECOMES THE DEFAULT MAX PRESSURE FOR THE SYSTEM.

THE MAX PRESSURE RATING FOR EACH RIM WILL DECREASE AS YOUR TIRE VOLUME/SIZE INCREASES. REFER TO RECOMMENDED TIRE PRESSURE CHART.

ENVE Tip: Trust our tire pressure recommendation chart. The maximum tire pressure ratings on tires are not recommended operating pressures. Running the max pressure will not make you faster, rather, it will actually increase rolling resistance (making you slower) and discomfort (making you slower), jeopardizing the ride experience.