Thank you, SteveI bought my tires off E-Bay, with your OE R4s you would not need new Rims. With these smaller sizes, just about any automotive tire shop can mount them up for you. Only gets tricky if your rear tires are filled with liquid ballast. Which if they are, you will need an ag tire shop to pump out the fluid into a storage barrel or tote then pump it back into the new radials once they are changed out.
Listing for the front tires with free shipping.
Designed for sure-footed traction on turf surfaces, the Carlisle Versa Turf uses a chevron-lug design with 60% greater tread depth and a flotation design that disperses vehicle weight for traction without damaging delicate grass.www.ebay.com
Rear tires I bought also with Free shipping.