I have never really spent much time on a Road Bike. I am aware of the stated differences between a MTB being geometry, weight, tires, gearing etc. However, I know that the engine is pretty important as well. My question concerns the DEGREE of difference between the Road Bike and the Mountain Bike.
If I were to do a century in exactly the same weather conditions on an entry level Mountain Bike with 1.4 Slick tires how much slower would I be than if I rode an entry level road bike. I just want a general answer as i know there are other variables such as gearing on the respective bikes.
I just want a general idea. How much longer would it take to do the 100 miles on the MTB?