QuestionQUESTION: My Class A MH has 275/80R 22.5 Load Range H tires 16 ply
I am being told that 295/75R 22.5 load range H 16 ply -- are a sutible substitute.
Is this true?
also I have always been told that MH tire should be replaced every 7 years is this true -- if not what should I look for on the tires to tell when they need tobe replaced?
ANSWER: Vince,
A 275/80R22.5 Load Range H has an overall diameter of 39.8", is 10.9" wide on a 8.25" rim, and has a load carrying capacity of 6610# at 120 psi (single) and has an allowable rim width range of 7.50" to 8.25".
A 295/75R22.5 has an overall diameter of 39.9", is 11.7" wide on a 9" rim, and has a load carrying capacity of 6610# at 120 psi (single), and has an allowable rim wide range of 8.25" to 9.00".
So if the rims are 8.25" and there is room for 1/4" more width )and there probably is, then this swap is OK
Recent bulletins from the tire industry indicate that tires degrade simply due to time. The age of a tire is important even if the tire is unused. There some disagreement over how to best express this age limitation, but my take is:
If you live in a hot climate (AZ, CA, NV, TX, and FL) then the limit is six years. If you live in a cold climate (MN, ND, WI, MT, etc), then the limit is 10 years. States in between are ..... ah ........ in between.
---------- FOLLOW-UP ----------
QUESTION: Is it possible to go to load range "G" with a 275/80R 22.5 14ply.
Is it legal and if so -- What are the trade offs?
Thank you, Vince
AnswerVince,
If your vehicle came with Load Range H, then it is quite likely that you NEED Load Range H for load carrying capacity reasons. This is something that the vehicle manufacturer has to determine.
The tradeoffs? Overloading a tire increases the risk of failure.
