The MX2/DX2 4130 TIG-welded chassis is constructed from all chromoly tubing (1-, 1 1/4- and 1 1/2-inch O. D., and .095-inch wall thickness). Our sand cars have a 120-inch wheelbase and the front suspension employs a symmetrical upper and lower A-arm design, along with a center mounted Billet rack and pinion steering unit with Charlyn power steering. The tie-rods are chromoly, as are the spindles, and 4130 chromoly rod ends are used at all pivot points. Fox 2.5 internal bypass shocks with coil over springs supply 22 inches of wheel travel. Finishing off the front end are ProAm disc brakes, along with Douglas bead lock rims that mount Mickey Thompson tires.
The independent rear suspension is of dual pivot trailing arm design, made entirely of chromoly plate. They are set up to use 7/8-inch rod ends at the inboard pivot points, and 7/8-inch rod ends outboard. The trailing arms are designed to be used in conjunction with Kartek's race-proven micro stub axle assembly. These shorter stub axles are designed for larger 930 CV joints and provide clearance for increased axle (Kartek 300M units) plunge, as well as incorporating ProAm disc brakes. The 20 inches of rear wheel travel is regulated by specially valved Fox 2.5 triple bypass shocks and 2.0 coil over shocks, and flotation is achieved with a set of Douglas bead lock rims and Sand Tires Unlimited paddle tires.