Originally Posted by
Grishnak
Tire weight is almost completely irrelevant.
I thought rotating weight was 5 times worse,bike still goes well on plusses though.
Tire weight counts up to twice when acceleration, but not when riding at a constant speed. When you compare the differences in tire weight compared to the rider + bike + wheels, you'll seer that your talking about a very small percentage.
Changes in rolling resistance can be much much larger.