rjproctor

I was thinking of changing the front from 275/80R22.5 to 275/70r22.5 which is slightly shorter than the 255/80R22.5 which is on the back but has a much better load rating. Changing the front from the 89 to the 70 trims a little more than an inch off the diameter. The 255/80R22.5 which is the recommended tire has a max load of 5,205 lbs max. The front axle portion of the GVWR is 10,400, or 5,200 lbs per wheel. I just don't feel comfortable with the weight being that close to the max for the tire since the weight distribution per wheel is not the same. Of course maybe this will be moot if when I have my axles weighed this Saturday I may not be close to the max. Perhaps I should have weighed my MH before I started posting.

The really old tire is on the inside passenger rear.

Thanks for the replies. The tire dealer suggested that I put 255's all around but I am tempted to change the front to something a little smaller rather than the larger size currently on the front. I currently have to use ramps to get into and out of my drive because the rear end drags on the concrete severely. Since the tires on the front are slightly taller than the one on the back it contributes to the rear end dragging. Maybe if I move to a slightly shorter tire on the front compared to the rear I can get closer to getting into and out of the drive with shorter or possibly no ramps at all. Thanks again.

I just bought a 38-foot used 2000 Newmar Dutch Star a couple of months ago. I just checked the age on my tires and found that most of them are older than 6 years, and one is actually 15 years old. So, I am looking to buy some new tires. I discovered that the two tires on the front axle are 275/80R22.5 and the four tires on the rear axle are 255/80R22.5. The manufacturer's plate in the motorhome indicates that the tire size is 255/80R22.5. Is it a common practice to have larger tires on the front? I can't find anywhere in the Birmingham, Alabama, area that can do individual wheel weighing, so I don't know if the front were increased because of additional weight safety. Any ideas would be greatly appreciated. If someone knows of a place nearby that can weigh my motorhome wheel by wheel, that would be nice also.