16" steelies on GTs

[prime]

how will the 16"s affect the speedometer and odometer readings for GTs?
will there be a significant difference?:pop

[Noisy Crow]

If you put the correct size tires on (205/55R16)... virtually no difference.

[shootemup]

how much is "virtually" no difference... lol

[mazdas3sporte]

good question, iam wondering the same thing???

[condor888000]

~1% too small. Very close.

[Noisy Crow]

~1% too small. Very close.


Original tire
Sidewall: 4.04 in
Radius: 12.54 in
Diameter: 25.07 in
Circumf: 78.76 in
Revs/mile: 804.44
New Tire
Sidewall: 4.44 in
Radius: 12.44 in
Diameter: 24.88 in
Circumf: 78.16 in
Revs/mile: 810.68


Speedometer reading with new tire is 0.77% too fast.
When your speedometer is reading 60mph you are actually traveling 59.53mph.

[Slade]

I actually have my winters on already. Going up Hwy 6 they have one of those digital boards that tell you your speed. My speedo said 95ish, while the digital board said 86 :whoa...Im gonna head that way again probably, next time I will set cruise and try to get an exact # :)

[dsichewski]

I actually have my winters on already. Going up Hwy 6 they have one of those digital boards that tell you your speed. My speedo said 95ish, while the digital board said 86 :whoa...Im gonna head that way again probably, next time I will set cruise and try to get an exact # :)

Where on 6? I went up north this morning and didn't see anything....is it south that they have this on?

[Dpostman]

If you have a buddy with a GPS Unit, That would be more accurate. Even the Trail handheld types used for Geocaching would suffice.

dp

[Fuman]

people please search...
http://www.torontomazda3.com/forum/showthread.php?t=21400&highlight=tire+calculator