Different size tires on stock rims
#5
Moving to 205 section width tires will NOT (in and of itself) alter how your speedometer and odometer register your speed and distance.
#6
Consider the following:
205/50 R17 -- Diameter: 25.1" (Factory size)
215/45 R17 -- Diameter: 24.6" (Too small, the speedo will register a higher speed)
215/50 R17 -- Diameter: 25.5" (Too large, the speedo will register a lower speed)
225/45 R17 -- Diameter: 25.1" (Just right)
#9
See my post above; there really aren't any 215 section width tires made that will work on your car without causing some speedometer and odometer error (errr, unless you want to buy 18" wheels and go with a set of 215/40 R18 tires). Long story short, if you want wider tires then your best bet is to go with a set of 225/45 R17s.
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staspmr
Mazda 323,Mazda 626 & Mazda 929
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04-01-2011 11:36 PM