The bike that spawned an entire forum of imitators, BMW’s legendary GS can go around the world without breaking a sweat. A careful study of the wheels shows that the GS means business. The hub-mounted spoke nipples keep out water and grit, and the spokes themselves slant from one side of the hub to the other side of the rim for increased strength (they can be replaced with the tire on the wheel). And shaft drive means no chain adjustments. All this wouldn't sound so boring when nightfall is coming in the Sahara and you’ve still got 150 miles to go.