Hello,everyone...I searched for answers,but didn't find what I needed. I have the 8" wheels and am looking for replacement tires... the only smooth that I can find are Nanking n800,but they are 21x12-8...too big for me I thinks. I figure that 20x7-8 (or there about) should be good. The only thing close seems to be a Carlisle dimpled knobby (18x9.5-8)that has a load capacity of 625 lbs. Don't know if I want knobbies. Do you guys check load ratings when you look for tires? The KF that I bought has Duro 16x6.5-8 ribbed tires that don't even have a load ratings on them...(golf cart tires,maybe). Shouldn't tires need to be capable of some speed and load capacity? Please chime in on what you've got.