ionbeam
2 FUN
What he said. Rain creates some safety issues which I will avoid if it is in my control and I don't enjoy washing Feejer after a rain ride.If it occurs on a trip, no prob. Have rain suit, will travel. I won't, however, purposely head out into it if I can avoid it.
Tire tread design and to a smaller extent rubber compounding determine how well a tire behaves on wet roads. Tire tread is in part designed to actively 'pump' water out from under the tire. When the tire can no longer clear the water away the tire will then float on the water, a.k.a. hydroplane. As your tires wear they start to loose some of their ability to pump water away and safety starts going down hill quickly. Motorcycle tires are designed to work in front/rear sets where at speed the front tire squeegees the water away so the rear tire has less water to deal with. This facilitates having less siping (tread cuts) in the rear tire, allowing more rubber contact for better performance. The wider 285-40-17 tires on my car actually do a better job in the rain than the 255-50-17 that came on the car. Tread design and rubber compound makes the difference.
Snow is another matter. Big tires are like snow shoes, you float on top and go no place. Small tire width cuts through the snow. There is one exception to narrow tires and snow and that is motorcycle tires. I have had to ride my street bike with street tires in deep snow several times and it is basically impossible to do. :cold:
Alan