Bringing cutting edge performance to the diverse needs of drop bar off-roaders, Reserve's 40/44 GR gravel wheels are tailored for the demands of off-road exploration and gravel riding, but with an aero focus. Leveraging Turbulent Aero technology, the 40/44 GR features a 40mm front paired with a 44mm rear, establishing it as the fastest and most stable Reserve gravel wheelset to date. Wider than the previous gravel wheels to allow for tires up to 50c tires, the 40/44 GR plays nicely with today's slew of big volume gravel tires and a semi-hooked rim makes tubeless set up easier than ever. Designed to be your no fuss aero gravel riding and racing wheelset Wider internal width of 27mm Tubeless and tube compatible Wide/low front mixed with narrow/tall rear for maximum stability, lowest weight and optimal aerodynamics Internally reinforced spoke holes to strengthen the area where the rim sees the most force, around the spoke nipple. This provides for improved strength without adding unnecessary weight Built with DT Swiss Hubs Specifications Rear Axle12mm Thru x 142mmRim Width (Internal)27Cassette Body TypeShimano/SRAM 11 Speed RoadFront Axle12mm Thru x 100mmValvePrestaColorCarbonWheel Size700cDefined ColorCarbonISO Diameter622 / Road / 29"Rim MaterialCarbonTire TypeTubeless ReadyHub/Brake CompatibilityCenter-Lock Disc