Looking hard now at some different options for tires for both the summer/mowing season and the winter/plowing season... (all of these pics can be clicked on to enlarge)
SUMMER TIRES:
I have a set of Carlisle All-Terrains on my JD GT235. They work great. The stock turf tires were useless on side hills and any sort of loose soil or mud. The Carlisles made my Deere go from slipping to gripping with nothing more than the tire change. Tire has 6ply carcass, so it's been great at resisting punctures and should wear for a looong time. Best price I've seen is about $85/ea. Considering these as the summer tire option #1
Second summer tire option is the Duro Desert/X-Country. This is a very similar pattern to the Carlisle and it's also a 6ply tire. $67+14 s/h so it comes out about the same as the Carlisle...
Third sumer tire I'm looking at is a Nanco N244 Desert. 6ply like the other two but the biggest bonus is that it's only $68 shipped...
WINTER TIRES:
First up is my favorite of the two. It's a company I've never heard of before, Trac Gard (model TL N686 All Terrain). 4ply carcass and price is $68 w/FREE shipping. I would be installing ice screws in the solid sections of tread in the center...
Other winter tire option is a knock-off of the Kenda Bear Claw ATV tire from a company called VRM, (model 189 Grizzly). No solid cleat sections for ice screws, but the good news is that it's a 6 Ply carcass, so it should wear better on ice. Best price I've found is $90 w/FREE shipping.
The stock chevons my 721D came with are already showing a surprising amount of wear from just this winter's snowthrowing duties. I was kind of stunned to see the hard edges already wearing down to a rounded profile. Not sure what ply these stock tires are? Anyhow, my solution is to go with either 4ply + ice screws OR a stiffer 6ply tire by itself and see how they hold up. If anyone has personal experience with any of these tires or brands on their mowers please reply.
BTW... all of these are for the larger 10" GH rims, which means I'd have to buy 4 new rims and sell my current 8 inch rims. Ugh! Too mad no one makes these nice tires in 8" rim size. LOL. Oh well.