Anyone have a bobcat 610 with R-4 tires on it???? I'm looking to put wider tires on as my current tires 7x15 (turf tires) are too small for the soft ground I'm working in. I just sink and keep getting stuck. I'm hoping a wider tires will help. I didn't want to use spacers, if possible, so anyone have any ideas on the size of tires and rims will fit my 610???? thanks Tim