Am i going to fast,or to slow??
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http://www.chris-longhurst.com/carbibles/index.html?menu.html&tyre_bible.html
just scroll about half way down and you'll see it
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well you'll need to know stock tire size (check the door jamb). ...because of course everything will be calibrated to the stock tire size, and you'll need to know stock tire diameter/circumfrence to compare to the 245/40/17 diameter/circumfrence to figure the % difference to know how far off the speedo is and to which direction...
So yeah, get stock tire size, and make sure of your current tire size...
and then jump on that site that vento posted and figure it out...
and wallah, there you'll have your answer....
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you can take it to a shop and ask the technician to take a look at the computer and have him put the new tire and rim diameter in and that will recalibrate your spedometer and it will be completely accurate
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well on my eclipse in 5th gear is perfectly on alls i do is take the rpm's x 20 +10 and thats my speed haha.
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not yet i have an appt. at Valley Imports ..once my car is done....but jeremy taught me hgow to read it lol....so who knows if its right...has he got thwe backfire fixed on his Sti Yet?
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