I'm in the market for tires, I have a 40 ft Discovery diesel pusher with the original Good Year tires on it. Year model is a 2008, I was checking with the local Camping World in San Bernardino, Ca. 6 new Goodyear G670RV 275/70R22.5 are running about $ 4,600.00. They tell me Michelin doesn't make this size any more, but they have Sampson's in this size for around $ 2,200.00 for all 6. Does anyone have experience with this brand? I average about 1,000-1,500 miles per year on my coach, any knowledge would be greatly appreciated.