I recently have got into ATV trail riding and enjoy it thoroughly now but there's one thing that's been bothering me: Why don't people run beadlocks and air down their tires? I've always been into 4 wheeling and wheeled my k5 blazer for a long time that had beadlocks along with most people that wheel frequently. And I don't understand why people don't do it on ATVS

? I know on a full size truck, aired down tires get substantially better traction and i figure the same would be true with a ATV. I just bought a Foreman 500 and was browsing beadlocks and only found some expense carbon fiber ones that look good but at $249 a wheel, it's a little expense. Anybody got a line on some good beadlocks.
I know beadlocks will add weight which will increase your rotating mass but with the weight of a beadlock centered closer to the hub than say a heavy tire, but that's about the only thing I can come up with for why beadlocks aren't run on utility ATVs. (I know people run them on the sport class ATVs)