Rock Crawler, Street Lock ™ wheels are proven strong on MOAB’s (and other places like it) hard-core terrain. The Street Lock ™ is a great alternative to a real bead-lock wheel. A smooth rolled heavy-duty outer ring is welded 360 degrees to its rim shell making the wheels’ outer lip super strong to withstand the most severe off-road punishment against rocks and rough terrain. The rolled outer edge helps prevent tire sidewall damage at lower air pressure. Style to look like the real thing, but unlike it’s counterpart, the Street Lock™ is legal for street use.