Independent Trucks Mid Polished 139.New Independent MiD trucks feature a lower profile hanger for optimal contact point angle on your nose and tail for flip tricks, ledges, and all-around street skating with a recommended wheel size of 53mm and under. The newly designed and first ever Independent inverted kingpin can be used with either a 5.5mm Allen key or standard 9/16" hex wrench. The innovative new Shaft Nut in the baseplate creates a rigid and durable solution to lateral movement found in most inverted kingpin designs and increases adjustability.356 Aluminum hanger and baseplate.4140 Chromoly steel axle.Inverted Grade 8 kingpin w/ 9/16" & 5.5mm Allen.Steel Shaft Nut with nylon locking insert.Axle width: 8" (203mm).Hanger width: 5.47" (139mm).Truck height: 2" (52mm) Mid.Fits boards: 7.875-8.125".Sold as a pair.