The G27 is the G23's little big brother. Smaller in diameter and lighter in weight, the G27 is designed for the higher-volume tires demanded by many riders on rougher and looser terrain. At 320 grams, our lightest tubeless rim is 27mm wide and designed for tires marked 27.5 or 650B. Armed against pinch flats with the patent-pending Wide Hookless Bead, the G27 is at home off-road and capable on tamer stretches of singletrack.
Who It's For
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 bikepacking adventures, the G27 may be for you.
Why We Made It
There is a place between road and mountain that is 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 insights 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 light weight 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 treks possible.
Going tubeless allows you to run lower tire pressures without the added weight of a tube. Lower tire pressure has many benefits, including greater traction, lower rolling resistance over rough surfaces, and decreased risk of a puncture-related flat.
Tubeless-ready rims and tires are parts of a complete system that eliminate the need for tubes by creating an airtight chamber between the rim and tire. Liquid sealant is added to the chamber to fill small punctures and maintain air pressure while you ride.
UST (Universal Standard for Tubeless) is a specific type of tubeless system that dictates the shape of the rim and tire beads. UST rims should be paired with UST-specific tires for best results.
|Brake Compatibility||Center Lock Disc|
|Inner Rim Width||27mm|
|Outer Rim Width||35.5mm|
|Hub||I9 Torch Classic|
Front: 15 x 100mm
Rear: 12 x 142mm
* Subject to change without notice.
|Shimano/SRAM / Black Decal / 100 x 15mm / 142 x 12mm / 650B||818801027511||100-3112-016|
|SRAM XD / Black Decal / 100 x 15mm / 142 x 12mm / 650B||818801027504||100-3112-015|