I put Michelin 265's on my 2500HD. I used the Hypertech to reprogram the elctronics. It took care of everything EXCEPT the speedometer. Apparantly the speedometer part of the instrumentation is not driven by the DIC. Everything else like odometer and shift points were correct.
As for the tires, I really liked them. They were still on the truck when I sold it. They had 35,000 miles on them and did not look half worn. I never experienced any stability problem with them. I always inflatd them to 80psi and stillhad a good ride even when unloaded.
Bigger tires are not an option for Bubba as duallys require some minimum seperation to keep the tires from coming into contact with each other.
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