[guido]

Back when I was drag racing snowmobiles a lot of the more successful racers obsessed about reducing rotating mass.

From what I have read here that unlike the garden guys the pulling crowd tends to not use wheel weights or load their tires. I get it. Less rotating mass equals greater wheel speed.

Sitting here swirling the ice in a tumbler of White Label got me thinking. (yes, it hurts sometimes) Are fluid filled tires really considered rotating mass?