[mott]

1619 ran an 8WD with 6" pneumatic wheels/tires in a West Coast config with bearings pressed directly into .1" VEX 1"x2" tubing with zero issues. Our machine competed at 2 regionals, Champs, IRI and a handful of "street demo" events (where our students decided to use curbs and parking barriers as makeshift Defenses).

Running spacers inside the tube wouldn't have been an option for us because we run a chain-in-tube set-up.