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panel fan · 12-02-2020, 08:35 PM

I suspect the reason for the shortage of 3.90 's was lack of demand as at 60 mph
on 30 in tires there's only a little over 100 rpm difference , hardly worth the effort .

John

12-02-2020, 08:35 PM	#240
panel fan Registered User Join Date: Nov 2015 Location: Whitby Ontario Canada Posts: 12	Re: Eaton HO72/HO52 vs. 14 Bolt FF I suspect the reason for the shortage of 3.90 's was lack of demand as at 60 mph on 30 in tires there's only a little over 100 rpm difference , hardly worth the effort . John