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Old 01-01-2013, 08:54 PM
OhioMike OhioMike is offline
Ford Ranger Driver
 
Join Date: Dec 2010
Posts: 2,761
Default Re: speedometer read 10% high

Quote:
Originally Posted by sgtsandman View Post
No argument here. Both trucks read about 2 mph fast. The CR-V was 3 mph fast before I stepped up from the stock 205/70/R15 to 215/75R15 tires. Now it is dead on.

There was a magazine article a few years back covering this. It seems most vehicle manufacturers are allowed a certain percentage of leeway on speedometer accuracy. Most opt to have their speedometers read fast. For legal reasons I think.
I know that odometers can be off also, and evidently it is common knowledge that speedometers can be inaccurate also. But, if that is the case, why do some say, "Ford's are more prone to be off" since manufacturers buy from other companies. So, a Ford speedometer, for example, can be manufactured by any number of suppliers.
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