I wonder how average speed on a 28-30lb bike with 26x2.2 tires would compare to a sub 20lb bike with say 700x28 tires? say both had traditional steel frames? ie if a person averaged 16mph for 30 miles on the 28-30lb bike with 26x2.2 tires would they be any faster on a lighter road bike with 700x28 tires? all hypothetical of course I know there are many factors. just wonder if anyone has a stable with similar bikes that they compare like rides on.