John Deere in no uncertain terms states to always use the widest wheel setting when the loader is used. Having said that my 4310 was delivered with the narrowest setting. The tractor has 12.4x24R1, which are not a big deal to set. I have since got the 15x19.5 R4 for summer use. I swap twice a year, by myself. The way I do it is to drop the bucket to the floor to aid with stability. I then find a reasonably flat spot under the drawbar mounting to place my floor jack. I proceed to lift the rear of the tractor barely off the floor. Grab hold of the fender and try to rock the thing to see how stable it feels. In my case the tractor will set fine on the floor jack with only one rear wheel in place and in the air. As you will be going wider it is a good idea to stick a jack stand under the axels for a safety net. Probably no room when going narrow. I roll the wheel up to the tractor and tip the top out to me. I then work it back and forth until it is under the wheel hub flange, not too far, because you need room to straighten it upright. When it is set back up it should be one to two inches out from the flange. Continue to work back and forth until it is ready to go on the flange. Keep fingers and arms away from the top of the wheel under the fender. If both wheels are removed then the most hairy part will be to get one wheel on with a couple of bolts. after that you own it. Should be down hill. Good luck.