Not to hyjack, but in my opinion D60/s arnt needed utill you start doing 3.5-5 diamond trails running tires 37' or bigger. Even then I wheel the famed 3-5 diamond trails in Florence junction, AZ every weekend with a local club and I'm only running a front D30 ( sleeved, truss, gusseted, Crome-Molly axle shafts, ect.). The rear is a D44 ( truss, 35 spline Crome-Molly axles, arb). My tires are 37's. The key to not bracking anything is to let your gearing/lockers/tires do the work not your foot.