Originally Posted by afflatus
This is all great info. I thank everyone for taking the time!
I took some training rides that were around 50 milers. Decent pace of 12mph. Was using the mountain bike. All was good until I saw a group of guys in hybrids just pass me so effortlessly. Maybe it's just my ego, but it really looked like I was peddaling at the same RPM rate. Bottom line, I'll probably stick to my mountain bike since I am not doing this to race. But do 700cc tires really make that much of a difference?
What really helps is tire width and tread. If you can get by with 1.5 x 26 semi slicks on your mnt bike I would go that way. Way less rolling and wind resistance with a narrower, less treaded tire. Folks say that wind resistance is more significant than rolling resistance??? I don't know if this is true.