BMW

The tire swap is the upgrade that matters most on a BMW. A G05 X5 (2019 on) left the factory on 19- to 22-inch wheels, and the thin performance sidewalls that look sharp on Highway 280 get cut by the first sharp rock in a washed-out rut. All-terrains grip clay. And a good one still rides quietly enough for the carpool line.

Plenty of X5s came on run-flats with no spare in the cargo floor.

Swap to a conventional all-terrain and that safety net disappears, so the build needs a spare or a plug kit and compressor sorted before the trip, not at the trailhead. Our take? A stock-height X5 on good all-terrains will out-travel a lifted one on factory run-flats.

→ all-terrain tire installation

Your brake calipers, not your taste, set the smallest wheel a BMW can wear. Dropping from a 21-inch wheel to a smaller diameter buys back sidewall, the cushion that soaks up a root on a forest road and a pothole on Acton Road alike. Larger M Sport brake packages rule out some sizes completely. Measure, then order.

BMWs hang their wheels on lug bolts rather than studs and nuts. Hub bore, offset and bolt pattern also have to match your exact X5 or X3 generation, and none of it lines up with the Toyota trucks that fill most off-road wheel catalogs. Expect a shorter list.

→ off-road wheel fitment

A roof platform is the second most useful BMW upgrade and the first one people get wrong. Many X5 and X3 trims wear factory roof rails, a clean mount for crossbars or a platform. Two numbers set the limit. BMW’s maximum roof load in your owner’s manual and the rack’s own driving rating both count, and whichever is lower has to cover the rack, the gear and any rooftop tent combined.

Do the math first. Add up everything going on the roof and check it against the lower figure. Tent and rack makers rate the parked (static) load well above the driving number, which is how a tent holds sleepers.

Keep it low. A hard-shell tent on a flat platform roars less on I-65 than a tall basket stacked with gear.

→ roof rack installation

Alabama’s forest roads are unlit, and in the national forests the roads you can legally drive are shown on each district’s map. The Forest Service reissues its Motor Vehicle Use Maps each year and leaves getting the current one to drivers. Get yours before leaving Birmingham. Oakmulgee, Shoal Creek, Talladega and Bankhead each have one.

Factory headlights are aimed for pavement, not the shoulders of a gravel switchback. Pods fix that. Mounted low on the bumper or up on the rack, they light the edges of the trail, where washouts and deer show up first. Alabama requires them off or covered on public roads, so they get their own switch inside the cab.

→ auxiliary pod lights

Rarely worth it. Aftermarket spacer kits exist for some coil-sprung models, but they change axle angles on an SUV that was never designed for it. On a G05 with air suspension, the raised setting adds clearance at trail speed without new hardware. On a coil car, tires alone usually beat a lift.

An all-terrain mounted on the smallest wheel that clears your brake calipers, often a step down from the factory size. Keep overall diameter close to stock so the speedometer and xDrive stay happy.

Often, if the numbers work. It needs proper crossbars or a platform, and the whole load has to clear both BMW’s roof rating and the rack’s driving rating. Weigh the tent before you fall for it.

Yes, within tighter limits than an air-sprung X5, since no X3 has air suspension. An xDrive X3 is shorter and lighter, which makes it easy to place on a narrow track, and a roof rack wins back the cargo room it gives up.