pan y agua
Join Date: Aug 2005
Bikes: Wilier Zero 7; Merlin Extralight; Co-Motion Robusta; Schwinn Paramount; Motobecane Phantom Cross; Cervelo P2; Motebecane Ti Fly 29er; Calfee Dragonfly Tandem
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Depends on both bikes:
1) MTB with knobby tires, and no aerobars to a road bike with racing tires and clip on aerobars, the difference could easily be 3 mph.
2) MTB with high pressure slicks, dialed in aero postion with clips on, and a road bike without aerobars, the road bike could even be slower.