Thread: Gear Ratios
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Old 09-17-2003, 10:10 AM
Duke2.6 Duke2.6 is offline
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Join Date: Mar 2003
Location: Southern California
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S-class with the 3.0L six should have a 3.46:1 axle. You can also cross check this with the following forumula.

Axle ratio = revs at 60/tire revs per mile

It should be within a few percent.

You can look up the tire's revs per mile by checking the "specs" for any 205/65R-15 (the OE tire size) tire on The Tire Rack site. The speed/rev relationship holds regardless of installed tire revs/mile. If the installed tire revs/mi are different than OE it will just add error to the speedo.

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