We had 2.125" tires on our tandem, and they were wide enough to cause occasional rubbing against the fender. I had to adjust the fenders frequently. When it was time to replace them, I browsed for quite a while. I wanted a slick or slick-ish tread, as we only ride this bike on roads. The Michelin Wild Run'r is fairly light and comes in a 1.4" size. I thought it might be too narrow and therefore harsh, but we don't notice any worsening of ride. We use 80 psi to avoid a squirmy ride. I'm happy with these tires.