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BrianG · 03.25.2008, 10:18 AM

The problem you are having is the high diff ratio of 4.09:1 and the largish spur of 48T. To get a lower rollout ratio with those values for the speed you're looking for, you're gonna need a large pinion. And since you are looking for a real 60mph speed, you should probably be shooting for a calculated speed between 65 and 70 mph, because wind resistance will drag you down a bit.

FYI, when you enter tire size, use the entire tire diameter, not just the rim.

What vehicle is this in?

	(#6)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	03.25.2008, 10:18 AM The problem you are having is the high diff ratio of 4.09:1 and the largish spur of 48T. To get a lower rollout ratio with those values for the speed you're looking for, you're gonna need a large pinion. And since you are looking for a real 60mph speed, you should probably be shooting for a calculated speed between 65 and 70 mph, because wind resistance will drag you down a bit. FYI, when you enter tire size, use the entire tire diameter, not just the rim. What vehicle is this in?