The 23ZERO Dirty Gear Bag is a 55-liter (14.5-gallon) canvas storage bag that hangs off your spare tire. It's built for the stuff you don't want inside the rig: muddy recovery straps, a wet traction board, soaked boots, a dripping rain shell. The shell is 400gsm poly/cotton canvas with a 1000mm waterproof coating, and the inside is lined in 450gsm PVC, so grime and water stay in the bag instead of soaking into the cab.
It drops over the spare with an adjustable webbing harness and cinches down with 2-inch quick-release buckles — no tools, a couple of minutes. Open dimensions are 27.5 by 22.5 inches with a 5-inch gusset and an 11.5-inch wheel arch, so it fits 32-, 33-, and 35-inch tires up to 12.5 inches wide. Adjustable anti-sag straps keep it from drooping when it's loaded heavy, and a drain eyelet in the bottom lets trapped water run out instead of pooling.
There's an internal zipped dry pocket for the things you want to keep clean — keys, phone, a dry pair of socks — separate from the filth in the main compartment. Hardware is 5mm stainless D-rings, 50mm nylon webbing, and reinforced box stitching on the major seams. When it's full of mud, pop the buckles, pull it off, and hose it out.
