RV and motorhome tires should be replaced by age and load rating as much as by tread. Check the date code and sidewall condition, confirm the load range matches your coach's weight label, and replace the whole axle together. Call El Paso Tire Shop in El Paso, TX with your tire size.
A motorhome that was parked all summer can look perfect and still have tires that shouldn't go back on the highway. Motorhome tires crack from sitting, not just from driving, and a failure at speed on a coach can tear up fender, plumbing and wiring.
The practical question is not how much tread is left. It is how old the tire is and whether it was ever run low.
What do I look at before a long trip?
Read the date code, then check the sidewall and the tread shoulders for fine cracking. Look at the valve stems too: a rubber stem on a heavy coach can crack or flop at speed, and replacing it is cheap while the wheel is off.
Check pressure cold, with a gauge you trust, against the number on the coach's label rather than the number on the tire's sidewall.
Why does the load rating matter so much on an RV?
Because a loaded coach is often closer to its tire limit than owners assume. Water, gear and passengers all add up. The tire's load range has to cover the heaviest axle with room to spare, so ask for a tire sized from the certification label.
Dual rear wheels add a second consideration: the two tires on a side should match in size and wear, or one carries more than its share.
Do I replace one tire or the whole axle?
Replace in pairs on an axle at the least, and ask whether the quote covers mounting, balancing and valve stems. Bring the coach in rather than loose wheels when you can, since the shop can check the lugs and wheels at the same time. The shop runs Mon–Fri 10:00 AM – 6:30 PM, Sat 10:00 AM – 6:00 PM, closed Sun.
How old is too old for RV tires?
There is no single number that fits every coach. Read the date code, inspect for cracking, and ask the shop to look at them if the tires have sat for long stretches.
Should I replace my RV spare?
If it is as old as the others, treat it the same way. A spare with a hardened sidewall won't help you on the shoulder.
Can you balance motorhome tires?
Ask when you call. Give the tire size and wheel type so the shop can confirm it can handle your coach.