wow, a thread from 12 years ago.

there is something quite wrong if your road bike isn't at least 2mph faster than MTB on a given route, unless you have a huge amount of stop & go. if you are stopping every block for traffic lights, then I could see the two being close.

my MTB alone is 2mph faster with XC tires than with all-mountain / gravity tires. the big knobs compared to a 25mm road slick... yeah, not even close.