I picked up a really good condition 98 600 grizzly with 1200 miles 2nd owner and I would like to buy new tires and I am confused on sizes ?? tires are 25x10x10 but rims measure 11" and I am having issues even finding that tire size,why if my rims measure 11" are their 10" tires on ??

 

Fairly sure you wouldn't get 10" tyres onto 11" rims, and they wouldn't seal, so I recon your measurements are out. 10" seems odd for a big bike, I'm sure Big Bears and Kodiaks of that age have 11" or 12" tyres. 10" tyres are quite rare, but your supplier should be able to order them in. Have a feeling older Kubota RTVs used 10" rims.

 

I do believe the rims should be 12x9 front and 12x10 rear with tire size 25 8 12 front and 25 10 10 rear when you measure rim for width need to measure from inside to inside of bead area same for height a 12 in rim should measure at around 13 in from outside edge to out side edge