Widen Axel's? Wider tires?

[Elisaj]

An older gentleman friend of mine has a1995 32 foot Winnebago adventurer on the gm chassis. I google for him but have had no luck. What he wants to know is how wide of tires can he put on? And can you widen the Axel for increased stability ? If so, what size spacers and where to buy? Has anyone done this before?
Thankyou

[Skip426]

Welcome to iRV2 .

Tire size is limited by rim width and off set on dual wheels .

Offset " AKA rim spacing" prevents the tire sidewalls from " kissing " under load.
Kissing ( sidewall contact ) causes sidewall wear , overheating and blowouts.

Tire manufacturer's web site will give rim width and off set requirements .

For a motor home chassis with the axle probably near or at it's load capacity I would not recommend spacers of any kind.

Perhaps the best thing you can do for your friend is to take him with his RV loaded for travel over the scales , get front and rear axle weights and total RV.
To compare to the chassis GVWR , FAWR and RAWR
It's virtually impossible to make an overloaded RV handle well .