Our tires wear less in winter because we spend several weeks of it parked in Florida. More seriously, heat degrades tires so tires that run cooler in the winter may be that much better off. Exactly how much I do not know. The effect may be minimal if you run the right tires and keep them properly inflated, balanced and aligned year round.
Phil, keeping the tires properly inflated in winter time, is almost impossible, which is why i have opted the self inflated system on the new trailer.
i once did a check, inflated the duel drive tires to 105 psi. at the Petro in Wyoming. at 15*
the next day i was driving in Calif. at 70*, the tires had 146 psi.
once we drive up the mountain, we 'loose' air pressure do to the altitude ., once the temp. drop we lose too.
Ext. ...
however, the self inflated system, have a drawback in term of traction, when we needs them the most - on snow and ice covered roads.
when the temp. drop and with it the tires psi, the tires becomes more 'donutsy', flexible, and there for have more surface touching the pavement, and better traction.
the self inflated system, will keep airing ups the tires, and there for reduce traction in winter driving.
You'd think they'll come up with an 'off switch'...