Tires Ag vs. Industrial tires?

[radman1]

Radman, I wish I could agree with you on that last sentence....I run my front R-1s at 4-6 psi above max rated, and still have sidewall flexing issues with a full bucket of dirt. I recall a TBN member a while back saying there is a R-1 tire with the heavier R-4 sidewall. Seems like a good answer.

I agree, I still have flex/squish and also run mine above the psi. However, I don't feel too worried about rolling the tire off the rim at the higher psi. The R4s definitely do better under heavy FEL loads.
I have a JD 4520 with the hydraulic psi turned up from 2500 to 2800. I frequently max out the loader and flatten the front R1s by 25-30%. Just the nature of less stiff side walls with R1. Our ag tractor and FEL has radial R1 tires and those even seem to flex more under heavy loads.