Just learned about 50 lb and 80 lb valves reading the MOC. My dealer said to put in 50/ 55 lbs of air. The sticker on the left front of our 3280rl before it washed away said 80 lbs of air. After purchasing the 5vr and an air compressor, I dutifully put the pressure to 80. After that, PARKED, all 4 valves leaked and had to be replaced. The metal stem inserts came loose from the rubber. Question now is what are the replacements. Two ended up looking like the originals and two are all rubber. We never seem to run out of things. I'll keep reading. Thanks all for your always valuable input. Earl
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