Tires: tires size question, fender wells, rim width

Question
i found a screeeming deal on 2 tires for our fun mover   f650  fourwinds ,,,,  what is on the coach is 10r 22.5  f load Will 265.75r22.5 load g work and are they the same overall   dont want to mess it up to much  ..I know you can go up or down on auto tires  with out to much issue

Answer
Scott,

A 10R22.5 Load Range F has a load carrying capacity of 5205 (single) at 100 psi.  It has a diameter of 40.1", a section width of 10.0" and requires a rim in the range of 6.75" to 8.25" with a minimum dual spacing of 11.40".

A 265/75R22.5 Load Range G has a load carrying capacity of 5205 (single) at 110 psi.  It has a diameter of 38.2", a section width of 10.3", and requires a rim width range of 7.50" to 8.25" with a minimum of dual spacing of 11.61".

This means that you can make the exchange if and only if:

1)  The rim is capable of handling 110 psi (10 more psi).  The maximum should be listed somewhere on the rim itself.  BTW this also means you need to use 10 psi more.

2)  The rim width is 7.50 or 8.25".

3)  There is at least a 1/2" side to side clearance under the worst condition - which is with the suspension fully compressed AND the steering wheel fully turned.

4)  That a 1" lower ride height would not cause problems.

5)  That if this is going to be used in a dual application that the dualed spacing be at least 11.61" (0.21" - about 1/4" - more).

I can not tell you if there is enough room in the fender wells.  They just don't publish that information - it has to be measured.  But usually trucks of this type have plenty of room.

Good Luck.

But there are a lot of indicators that this might work.