We are going by ROAR rules.
http://www.roarracing.com sc4X4 production vehicles only in sc4X4 class, same for sc2X4.
sc2X4 is the most inexpensive class but extremly challanging.
Just checked and rules are out for the SC4X4 class.
MOST IMPORTANT motor size is 1/10 scale only no 1/8
8.10.13 1/10th Short Course Truck 4x4
8.10.13.1 Dimensional Specifications:
Item Limit Specification ( * measured axle center)
Wheel base* Minimum 320mm (12.59 in) Maximum 335mm (13.19 in)
Overall Length Minimum 540mm (21.25 in) Maximum 568mm (22.36 in)
Overall Width* Minimum 290mm (11.42 in) Maximum 296mm (11.65 in)
Weight (Ready to Race) Minimum 2325 gr (82 oz)
Vehicle Height Overall Minimum 199mm (7.835 in)
Wheel bead Inner Maximum 76.20mm (3.0 in)
diameter Outer Maximum 55.88mm (2.2 in)
Wheel bead width Maximum 39.37mm (1.55 in)
Wheel width Maximum 41.9mm (1.65 in)
Dish Style Wheels Expressly Prohibited
Tires Diameter mounted Minimum 106.68 (4.20 in)
8.10.13.2 Motor ANY ROAR Approved 1:10 Brushless (Modified, SuperStock, or Stock)8.10.13.2.1 Battery ANY ROAR Apporved 2S LiPo (7.4volt), 6Cell NiMh (7.2volt), or 2S LiFe
(6.6volt)
8.10.13.3 Four wheel drive with geared or ball differentials only.
8.10.13.4 No tire tread cutting, bald tires or custom cut tires allowed.
8.10.13.5 Body Specifications:
8.10.13.5.1 Full fender truck body. Body must completely cover tires when viewed from above.
8.10.13.5.2 Windshield minimum setback centerline front of body to begin windshield. See
diagram 1.
8.10.13.5.3 Cab roof minimum width and depth. See Diagram 2.
8.10.13.5.4 Cab minimum height and depth. See Diagram 3.
8.10.13.5.5 Cab Setback: Minimum setback is measured from a point equal to the Front
(centerline) of the body to the beginning of the windshield/lower rock guard.
8.10.13.5.6 Cab Profile: Minimum depth of the cab is measured from the beginning point
(centerline) of the windshield/lower rock guard to the rear reference point of the cab
8.10.13.5.7 Roof Panel: Minimum width is measured from outer most points of the roof section
to the upper side window reference line depth of the roof panel is measured (centerline)
8.10.13.5.8 No add on or integrated spoilers/wings allowed.
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8.10.13.6 Tire Mounted: Minimum Diameter of the tire (mounted) is established to limit
extremely low profile designs. The target dimension (new tire) is established at 4.30 nches. To
compensate for wear, molding tolerances, degradation of foam inserts, the pre- race minimum
allowable diameter of a mounted tire is 4.20 inches. Tracks and Promoters are encouraged to
select a “Stated” tire that works best for their particular location.