Craig,</P>
When you say 4x4 are we talking truck or ATV? If truck, the RTV should have no problems out-climbing it. If a ATV, you have some serious hills and need to get a bulldozer in there to cut trails to traverse the hills so they're not as steep (which is what I did).</P>
For a work vehicle, I wouldn't recommend the Rhino. For hauling firewood, I would still say the RTV is the way to go. I have similiar terrain and have no problems putting over 1000# of firewood in the box and coming down the hills. Going up hills with 1000# in the box isn't something I've tried so I can't honestly say how it would climb.</P>
Leaves in particular can get hairy when coming down hills. When wet, they can get slick. Have you considered getting a plow for either the front or rear of the RTV to plow the leaves/needles off the trails?</P>
As for tires and lift, where all are you going to be driving this? If you're going to be running through the yard or on pavement you may not want something as aggressive as the ITP 589's. If you're staying off-road and don't care if you leave marks, the 589's are probably theway to go. For an all-around tire, many have found the Maxxis Bighorns are one of the best. They run fine on pavement, no major marks on lawn but will still give plenty of traction in mud and on hills. I climb hills like yours with these tires and don't need 4wd or differential lock (although mine aren't normally covered with leaves). The 589's are pretty true to listed height (25"). The 25x10x12 Bighorns actually stand closer to 26 1/2" tall. For day to day use, I don't need a lift kit but when loaded and coming down hills into a corner, I do get a little rub in the front end. I'm going to get a lift kit from Essex (
www.essexmfg.com). I don't recall the exact numbers (maybe Dargo can chime in here) but I believe the 2" lift kit when on the Bighorns raises the front about 1.75" and about 1.5" in the rear.</P>
Brian</P>