When the flag drops and these trucks get up to speed, they're moving fast. Carl's truck may see track speeds up to about 105 mph using a 7.0 to 7.6 drive ratio (underdrive and axle gear set). Desert speed for the Trophy gets to about 120 mph while spinning a 5.14:1 ring gear. The short course truck rides on 35-inch General Grabber SCs mounted on 17x9 Renezeder beadlocks. The desert truck runs taller 37-inch Yokohama Geolanders on 17x8.5 KMC beadlocks.