When we purchased our 2001 Beaver Contessa 40' the previous owner had installed Toyo 265/75R22.5 Load Range G tires. The maximum carrying capacity listed for that tire is 5205 pounds at max pressure. We had the coach weighed and the front end weighs 10400 without a driver or passenger. The data plate for the unit says the front axle is rated for 10,400, how convenient! Sitting still we are at the capacity of the tires and axle and we are not going to change the axle. We have the same issue with the left rear where the weight is 10,800. If I'm reading the chart correctly the dual capacity for this tire is 4805 X 2 = 9610, or 1200 pounds below the actual weight. The right side weight is 8,800 which is well within the range of the existing tires.
I cannot seem to find a tire that will give us the weight carrying capacity we need in the 265/75R22.5 size. The closest I have found is 275/80R22.5 or a 275/70R22.5
When I compare the tire sizes this is what I'm seeing;
Mfg TOYO Goodyear/Michelin
Size 265/75R22.5 275/70R22.5 275/80R22.5
Diameter 38.5 38.0 39.7
Width 10.9 10.9 11.1
RPM 540 545 524
Single 5205 6945 6175
Dual 4805 6395 5675
Oddly enough when I went to the Les Schwab site the 265/75R22.5 was greyed out, meaning no longer available.
Besides the obvious improvement in capacity with either of the new tires, is there enough of a difference in the other characteristics to make a difference in how they fit? Both say they will fit the rims I have which is one good thing.
While I'm at it I'll take recommendations on tire pressure monitoring systems. Brands, model #'s, etc. Internal sensors or external (valve stem sensors), any issues with sending units, the need for repeaters, etc.
Thanks in advance for your input.
Thanks, Steve