Seems speedo is off.
10-06-2008, 12:52 PM
#1
Thread Starter
Join Date: Aug 2008
Location: Florida
Posts: 7
Seems speedo is off.
I got a 99- 04 predator tuner.. I set the rear end axle ratio to 3.90 and the tire revs to 822 ( my actual tire is 821 as on nittos site but the predator goes from 812 then the next option is 822) The tires I am running are on 18 inch rims 265/35zr/18 93w Nitto555..
It seems my Speedometer is off... I don't have an exact off but i would assume at least 5 mph and no more then 10 mph off.
Is there another option that could affect this? Any ideas?
It seems my Speedometer is off... I don't have an exact off but i would assume at least 5 mph and no more then 10 mph off.
Is there another option that could affect this? Any ideas?
10-06-2008, 05:54 PM
#2
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
Here's a link to my "what speed in what gear" calculator. Select your transmission, rear-end gears and tire size and see how the numbers work out...
FWIW I entered your 265/35-18 tire size and got 822 revs/mile (I use 97% of the theoretical value to allow for effective diameter under load [I.e. "shrinkage"])...
FWIW I entered your 265/35-18 tire size and got 822 revs/mile (I use 97% of the theoretical value to allow for effective diameter under load [I.e. "shrinkage"])...
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