Wider tires, like the 27mm FMB Paris-Roubaix, can be used at lower pressures to increase ride comfort. Photo: Caley Fretz | VeloNews.com
Question: 23mm vs. 25mm tyres
I ride with a group of recreational road riders who do, on average, 100 kilometers per week. Recently, most of the riders have switched from 23mm to 25mm tyres and like the ride better (whatever that means). As a theoretical question, if you had one 23mm and one 25mm, which would you put on the front and why?
Well, I would put the bigger tyre on the rear. It gives you more cushioning, and that’s where you need it more. The bigger tire size also reduces rolling resistance, and that will make more difference on the tyre that is supporting more weight — the rear tyre.
The 25mm tyre also gives you more traction, assuming you’re running lower pressure in it than in the 23mm one. I suppose arguments about traction could be made for either the front or rear wheel.