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Bigger Wheel Diameter... Speedo Is Off??

Old 19-Sep-2007, 02:54 AM
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Bigger Wheel Diameter... Speedo Is Off??

i recently upgraded to 16 inch rims on my civic and i am using 205/50/16 rubbers..
from an online gear calculator i can see that my actual speed at whatever rpm in each gear has increased..
so it would be safe to assume that now when my speedo says im going 125km/h @ 4000rpm in 5th gear, i am probably going a few km/h faster (130-135??)...
how do i go about correcting the improper speed being displayed?
what is the process in recalibration?
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Old 20-Sep-2007, 01:13 AM
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n e 1?
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Old 20-Sep-2007, 09:19 AM
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Can't really correct it. You need to keep the wheel diameter the same as the factory wheels to keep the speedometer reading correctly.
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Old 20-Sep-2007, 02:30 PM
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the max you should be off is recommended around 3%
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Old 21-Sep-2007, 09:45 AM
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why do u have such tall tires on your car???
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Old 21-Sep-2007, 11:01 AM
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im using prelude rims and tires.. i guess next summer when i buy new tires ill go with 45 series to correct the problem since there doesnt seem like there is a solution..
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