The Speed Tuned GRTR21d is a Gravel (GR) Tubeless Ready Disc rim that is still light enough for road. This rim is 22mm tall, 25mm wide, with a 21mm tubeless ready inner profile that’s really strong, extremely stable, and at 480g, is still very weight competitive. You can run higher pressure road tube tires on them, tubeless road, or wider/higher volume CX / Gravel type tires.
