I put these in my Trail Wings because they suck and were just going to rot in the back of my garage. 120 in the front tire and 60 in the rear. I used size A but you could go even shorter. Winter Tire Studs I have about 100 miles on them now mostly on ice and snowy roads without losing one stud. I Gorilla Glue'd them in just to make sure. On dry pavement the handle ok but I wouldn't dive into any corners. In the crappy stuff they are amazing. I have used Trelleborgs in the past but only off road. The studs are far to long for the street. Just a tip for the other 'rounders' out there.