01-17-2018, 12:36 PM
Is it mandatory? NO. Is it advisable? YES. The 365/70R22.5 has a carrying capacity of 10,500 pounds per tire at 125 psi while the 315/80R22.5 has a carrying capacity of 9080 pounds per tire at 130 psi. Newell recommended a maximum cruising speed of 65 mph for the 315 and 75 mph with the 365's. Coaches beginning with #443 (a 1997) can be fitted with the 365's.
Have your coach weighed BY TIRE POSITION. If you are close or over the 9080 pounds per front tire, you should change to the larger tires. If you are well under that weight on the front and don't mind driving at a reduced speed, you should be good to go with the 315's. Remember that the weight of each Newell is different. The model year, the number of front slides, the floorplan and how you load your coach will all affect the weight on the front tires. You will get more peace of mind and a smoother ride with the larger tires since you can reduce the tire pressure.
Have your coach weighed BY TIRE POSITION. If you are close or over the 9080 pounds per front tire, you should change to the larger tires. If you are well under that weight on the front and don't mind driving at a reduced speed, you should be good to go with the 315's. Remember that the weight of each Newell is different. The model year, the number of front slides, the floorplan and how you load your coach will all affect the weight on the front tires. You will get more peace of mind and a smoother ride with the larger tires since you can reduce the tire pressure.