Do a search for a similar thread on this subject, around March/April 2002.
A big debate started about the use of the term "bar turf", but contained info that you may find useful.
Last fall, I bought a set of ag (r-1) tires/wheels for my BX 2200 for approx. $300.00.
This spring, when lawn mowing time began, I swapped only the front tires for the turf, leaving the ag tires on the rear. The only time marks are left is on muddy turf.
After two months of this, I will leave the rear ags on all the time, swapping to fronts ags for ground engaging implements. (box blade, york rake, & rotary cutter) The traction gained is significant.
Changing the front tires takes approx. 10-15 minutes.
Remember to torque the wheel studs properly after installation and use.
Hope this is helpful.
WALT