Through all that we have learned from our original RS3/4, and RS3/5 models, we have identified that the most balanced profile is 40mm. Each pairing, whether it be a 35mm front and 45mm rear wheel, or a 35mm front and 50mm rear wheel. Overall, the 40mm profile provided what we believe is the most balanced, and balance is what the new RS40 model is all about. The perfect match of aerodynamics, climbing performance, and all wind conditions performance. RIM TYPE: Clincher / Tubeless Disc BrakeRIM DEPTH: 40mmRIM WIDTH: 25mmINTERNAL RIM WIDTH: 21.5mmHUB MODEL: Realspeed RSH-246, Center Lock Rotor, 12mm thru axle, 110mm front, 142mm rearHUB COMPATIBILITY: Shimano / XDRSPOKE COUNT: 24/24SPOKES: Sapim CX-Ray Race SpokesWHEEL SIZE: 700c WHEEL SET WEIGHT: 1480gRECOMMENDED TIRE SIZE: 28mmMAXIMUM TIRE PRESSURE: 100psiMAX RIDER WEIGHT: 250lbs