Well, my point was IF you lose 1 mph with fatter tires WHO CARES!!! The butt saving comfort is worth the risk. Me, I'm a fast rider when on my bikes. I've never had a slowdown with fatties. I'd say, for a newbie, reading up on this subject might be enlightening. But, unless your a competitive athlete, then a slightly slower roll is no big deal. And, for most, I doubt they roll any slower anyways.

PS: I'm not the op, so please let him/her know what's up. Me,...I always go fatter tires. Where I live it's pothole hell!!! Lol!!!