riggarobExplorerOct 14, 2013tire sizegood day. I'm at a tire shop and I want to upgrade my steer tire size from 275/70- 22.5 to an 80 series tire. Its on '08 Fleetwood Providence, on a FL-XCS chassis. has anyone done this? Robbie
robatthelakeExplorerOct 15, 2013275/70-R22.5 tires are 0.35 inches (9 mm) larger in diameter than 235/80-R22.5 tires and the speedometer difference is 0.9%Not a whole lot of difference!
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