I'm using high gear in the sand hill climb.
It has a has a 3'' stretched carbon chassis. Summit transmission that is using a 68T spur gear and 12T pinion gear, CVD drive shafts through out, brushless 4074 2200 kv motor, SMC 9400mah 2s in series (4s) lipos, RC4WD tires Custom wheels and a cool body and holds up well to rock crawling. weight is 16.5 pounds loaded!
The shocks are sweet and it doesn't break down since it has a aluminum diff housing and CNC carrier. The servos are Hitec HV units that run on 8 volts and has a sweet L.E.D. light system. I will soon add a sound box that will really set it off.