Polaris makes a rad for the rear of the tunnel. It is a 2-piece design with a u tube connecting them together. The seat is molded around the coolant hoses feeding the rad. This works in conjuction with the front rad. If you are having problems with studs, I'd solve that problem before trying to relocate. There are great stud protectors out there. I have ridden Polaris sleds for 12 years, always studded the track, and never lost the front rad - knock on wood!!