850 pounds is light, you said with bigger tires it is another 500? what size tires ?
That 60 and a good 72 would be a great combo for sure, I think I would want a 54. So the ride was good at speed and it holds hills better than the big mowers?
That is why I do not like the newer 72 Hustler Hyper, it is 1600 pounds so on steep hills it would be questionable.