check if the tires are nylons. nylon tires get slippery in wet weather. the majority of solid rubber tires will still give decent traction on wet pavement. i have been using slicks, Schwalbe Kokaks in rain and a few times caught is hail storms, and the tires have kept traction. when i know i am riding in wet weather, i will drop my tire pressure by around 10 to 15 pounds to get a bit more patch on the road. i reserve my max psi for dry rides.