I use a smooth rim with Rimjam pads and find they work excellent If you want to ride in the rain I think a grind is your only option though. I personally don't want to grind my rim as I'm not keen on the noise and having to replace my pads all the time (had my rimjams on for over a year of regular riding now) plus the smooth option works fine and I don't ride in the rain.... you tend to get wet. If I get oil on the rims I just rub over with good quality sandpaper which works lovely Hope this helps, Kev