Left is holding front and rear tubes, rim protectors, bailing wire, Paracord, and has a little room left. Right side has dirt napper, snap jack, tire levers, knife, and also room to spare. The dirt napper is a touch too long for the bag, but fits well enough. Haven't sorted the strap situation yet, but these small 303 Rolies seem to be made for these racks. I also test fitted my 1.5 liter fuel bottles and they're good to go as well.