I've read an opinion being posted recently in a couple of threads stating that a wb can be faster that a ztr. I don't see how this is possible. This is my 23rd season and I've used them all. All sizes, all shapes, all configurations. Blah Blah lawn size. Blah Blah obstacles. Humpin it behind a wb will give you heat exhaustion by noon on a nice Summer day. A guy on a ztr will accomplish alot more and still be able to have children at the end of the day. And don't yap about strength. I spread 3000 lbs + of lime with a Lesco push spreader the other day over all manner of terrain.