Optimum Cruise RPM - TDR Roundtable

Optimum Cruise RPM

10-25-2009, 12:23 AM

#1 (permalink)

JHumphries

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Join Date: Apr 2008 Location: Bremerton, WA Posts: 291

Optimum Cruise RPM

I am in the planning stage of a project truck, and am trying to figure out tire sizes and axle ratios, and came upon a question
What rpm should I shoot for when I'm cruising down the highway.
I am looking at Arvin Mertior's MX-120 axles, for some ridiculous load capacity. (I know, the frame can't handle near what the axles can, but I want to run 10 lug rims, without an adapter, and the ratio choices are better spaced.)
I am planning on running any where between 33 and 37 inch tires (I am leaning towards about 35)

To boil it down to a simple question what is a good cruise rpm? (with load of course.)

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2006 Mega Cab Dually, Hand Shaker, BD Brake, 3.73 LSD, Short bed for now.

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