Also, what are you guys talking about bb's? So you are pouring in some bb's inside of the tire and letting them fly all over the place inside the tire?? How many bb's per tire? Like a hand full or something? 
On a 36-37 inch tire, you would need about 10 oz's of BB's. If you use BB's, make sure they are the steel kind, don't use the copper-coated ones. The coating flakes off and when mixed with water and moisture, they clog the valve stems. Steel shot for shotgun shells make good BB's too
