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RC-Monster Mike · 08.10.2005, 11:44 PM

It is a 65 tooth. It clears the drive cups, too! About an 11 tooth pinion would be the same reduction(which I don't have). A ten tooth would be a little slower(more reduction 6.5:1), while a 12 tooth would be slightly faster(slightly less reduction 5.4:1) than the 12/72 (6:1 reduction).

	(#20)
RC-Monster Mike Site Owner Offline Posts: 4,915 Join Date: Nov 2004 Location: PA	08.10.2005, 11:44 PM It is a 65 tooth. It clears the drive cups, too! About an 11 tooth pinion would be the same reduction(which I don't have). A ten tooth would be a little slower(more reduction 6.5:1), while a 12 tooth would be slightly faster(slightly less reduction 5.4:1) than the 12/72 (6:1 reduction).