Asphalt skies. Homemade to nhra specs. I used a 4"x2" wheel. The wheels have maybe 4 runs on them. This wheel I was using would last 3 years with running 14 events a year. The rubber is same duromiter rating as whal. These skis were on a Polaris, 2 arctic cats, and a yamaha v max 4. Plates have...