I run BB's in my 35" km2's
Ive had them in there almost a year and broke the tires down a few days ago to change wheels, there is no rust, or any other issues inside the wheel and the bb's still look brand new.
i ran them with and without beadlocks. Did MUCH better without due to the extra 25pounds of steel on the outte rlip of the beadlock. I balanced the tires to within a few ounces of being good and the bb's took care of the rest.
Without the beadlocks 8ounces gave me little vibes at all.
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