I made reference to 3 different mag articles two in RC Car Action and another in their sister magazine Radio Control Nitro. The high speed clutchbell option only makes the final gear ratio between the two cars the same. And a stock Fusion with a thundertiger 21 was clocked at 75 mph with the optional gearing radar confirmed in RC Car Action. The whole comparison in my opinion was flawed because both cars should have 21 size motors in them same gear ratio and tires. And like I said who keeps their car stock?