14. Stopping power for our lightweight Flattie will now come from a set of Ford Explorer disc brakes. Here you can see the original Explorer 5-on-41⁄2 bolt pattern next to our new machined 6-on-51⁄2 bolt pattern. The six-lug pattern is very strong and matches Toyota, many FSJs, and Chevy 1⁄2-ton 4x4s. Also gone are the days of our Willys suffering from mud packed rear drum brakes. Dynatrac offers several larger brake options, but our old school flattie still runs 15-inch wheels.