+3.7 watt savings
The new Race Dual-Compound places firmer rubber at the center tread and softer rubber on the shoulders for cornering traction resulting in a +3.7-watt savings in rolling resistance over R3 TLR. (R3 TLR 28c vs. Aeolus RSL 28c at 22mph (35km/h) and 150lbs. (68kg) of load on a single tire using Trek's in-house treadmill).