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hey guys i have used the calculator and it said my speedo is faster by 8.2%
so when i am doing 60 mph i am really doing like 54-55 mph
is this only when i have these aftermarket rims on, so if i put stock back on it becomes back normal

my rims are the same weight as the stock steelies
20.2 lbs

i have 205/40/16

what size is the stock tire?
185/65/15? i think this is it i cant remember
 

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moogen is right about the stock tires. The reason that your speedo is off is due to the fact that the side profile on the tire is low in relation the the size rim. If the sidewall was increased to a 45 or 50, the spedo gap would shorten thus being a little more accurate.
 

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In other words,
You over all wheel/tire diameter is smaller than stock, therefore your speedo says your going faster than you are, if you go with a high aspect ratio (go to a 50) then your over all diameter will be bigger, maybe the same as stock
 

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should of gotten 205/45-16's
 

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hmm I roll on 205/45/17 on my accord how far is mine probably off?
 

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wesside said:
hmm I roll on 205/45/17 on my accord how far is mine probably off?
whats your stock size?
 

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ATISTANG said:
If your car came with 15s then that is the correct size
Yea accords come with 15's I might had hoopty hubcaps 15 or 14" cuz I got the lx

I know my speedo is off some
 
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