Width of 8 lug wheels on 7K axles?

[sidney]

Anyone know the width of the 8 lug wheels that come on the 7K axles?

I'm looking for the maximum tire size that can fit on the factory wheels.

Thanks

[goduc]

According to this site http://www.tredittire.com/wheels which is a major supplier of 5th wheel and TT rims, 6" is the largest they sell. Their 16x6" 8-6.5 rims are rated for 3750lb each for a total of 15,000lbs for four.

[dieselguy]

You're not going to be able to go much bigger than LT235 85R16 due to axle spacing. At that you've only got about 1.5" between tires.

[Ninemmsig]

My ST 235 80 R16 have just under 2" between them. Triple axle 36DBK5 toy hauler.