Originally Posted by jeepjamesw1
I've never aired down any tire for winter other than from neglect. I've aired down for rock climbing but never for Ice. Please keep this subject open to see where it goes. It's 6pm in Utah and it's 44 degrees F. Most of the snow here is melting real fast. Does anybody care about water over ice. Maybe no tire can handle that without studs or chains.
I already know from past experience with other tires that airing down at least 5 psi helps a lot for winter traction.
Airing down 8 to 10 psi helps traction even more, but then you can't drive on freeway at full speed when snow/ice melts.
Airing down 5 psi still leaves enough psi for freeway driving and decent high speed cornering.
That ^ has worked well for me with 225/75R16, 235/75R15, 30x9.5R15, 245/75R16, 33x10.5R15, and 285/75R16 tires. I haven't owned or tried other sizes. I'm sure any size tire would have more Winter traction when aired down, but I don't know how much airing down for other sizes.
This Winter I didn't air down because I wanted to challenge the tires more and because I was lazy. That almost got me killed on a steep curvy mountain road covered with ice. In future, I'll be airing down for each Winter storm.