mounting problems

got a set of 20x8 and a set off 225/30/20 and 2 of the tires mounted fine but the last 2 about 10 inches of the bead wont pop. any ways i can get them to pop?

when we put my tires on we ran a flatip around the rim while we was pushing the tire down and it snapped on fine i suggest you take the tire back off and try putting it back on that way,

side note- i wasnt aware they made 225/30/20's

haha.....ether(sp) my buddy just put on his 39.5" tires today by exploding them on with ether. haha id like to see it done. its funny to me to even think about it.