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post #1 of 5 (permalink) Old 01-01-05, 12:09 AM Thread Starter
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Speedo difference on 18's???

If I fit 18's to my turbo ute, wont the speedo be out due to the different tyre circumference, or can it be changed to suit and tyre size?

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post #2 of 5 (permalink) Old 01-01-05, 01:39 AM
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Re: Speedo difference on 18's???

if it is out with the 18's u can change to suit how u do it i dun know but it can be done
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post #3 of 5 (permalink) Old 01-01-05, 03:14 AM
 
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Re: Speedo difference on 18's???

You don't need to change anything. You can put either 235/40R18 or 245/40R18 tyres and it'll still be legal and your speedo won't be out by a lot anyway. With 235/40R18 it'll be out by 0.3% and with 245/40R18 by 1.5%. You'd be wasting your money.

There's more info on this in the FAQ.
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post #4 of 5 (permalink) Old 01-01-05, 04:59 AM
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Re: Speedo difference on 18's???

My car's computer was set to 18 inch wheels and I had the standard 17 incg wheels fitted, with this combination my speedo read about 10-11% high (verified with my GPS across the nullabor). When I got to Perth I had Ford reset my computer to 17 inch wheels and now it reads about 3-4% high.
If you are going the other way your speedo is likely to read low, be careful of speeding fines or get Ford to reset the wheel setting.

Cheers
Brett
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post #5 of 5 (permalink) Old 01-01-05, 05:03 AM
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Re: Speedo difference on 18's???

Ford can reset the comp to suit what wheels ya got.....

TS50 no-125
TE50 no-94
"The TE50 is the best high performance sedan Australia has ever produced"
Street machine Feb 2002
TE50T3 Remember the GTHO? well your getting close.
Motor mag Jan 2002

Wouldn't you love to say that about your car?You loosers
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