Originally Posted by
mtb_addict
my prevous roadbike had 28.
now i have 25.
i feel noticeably faster on 25 and less fatique.
and 25 feels just as cimfortable as 28.
just came back from group ride. i was just barely able to keep up. if i still have 28,... i would have been dropped fir sure. for sure.
difference in speed may not be much...but its diff btn winner and loser.
how do you know your new road bike isn’t more comfortable and faster? Have you tried 25s on your old bike or 28s on you’re new one and ensured your pressures were appropriately adjusted?
One thing that I don’t think I read anyone say: Aero wheels are way faster in flat races. But your rim width needs to be proportional to your tire width. If you wanted a 35mm tire, you’d need a rim that was 37mm at the bead and probably 40mm at its widest to achieve a toroidal shape. This wheel and tire combination would be significantly heavier than a 25mm tire on a 28mm rim. This explains why pros tend to ride narrower tires than may be appropriate for slower riders.
That being said, if you’re not running aero rims, the benefits of narrower tires go down considerably since you can just put a wide tire on a narrow rims.