I'm running an Avon Cobra on back right now and love it. I paid $183 (£134) for the tire shipped free from ATV Parts, ATV Tires, Dirt Bike Parts, Motocross Gear, Motorcycle parts and Motorcycle Tires | Rocky Mountain ATV/MC. I took off the wheel and brought it into the local Triumph dealer who changed tires and balanced the wheel and new tire all for $30 (£23). If your buddy (mate) is doing the labor (labour) to remove and reinstall your wheel, you're getting a deal.