26x12x12 turf tires
 

here is link I stumbled across for a good deal on turf tires, won't fit my 149, but some of the bigger tractors use this size rears, $35.00 a tire seems pretty cheap!

http://www.surpluscenter.com/item.as...catname=wheels

I've got some tires from Surplus Center before.... The carlisle X-trac snowblower tires, great prices on some stuff.