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15's to 17's, speedo? 

 

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 Post subject: 15's to 17's, speedo?
Posted: Mon May 15, 2006 12:50 am 
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hey guys, i just upgraded from 15 inch wheels to 17' and was wondering will my speedo be out or will it be fine? i think i read somewhere that 15's and 17's use the same speedo gear... any help appreciated cheers?
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Posted: Mon May 15, 2006 12:56 am 
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I never noticed any difference going from15 to 18s.
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Posted: Mon May 15, 2006 12:57 am 
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wheel size only affects speedo readings if you go silly with tyre width/profile combinations

205/65R15 is less than 1% difference from 235/45R17

http://www.fordmods.com/forums/documents.php?doc=30

maybe do a search for this next time? it's been covered soooooo many times its not funny

 

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Posted: Mon May 15, 2006 12:59 am 
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cheers for that...i remember reading that doco but totally forgot about it, my bad
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Posted: Mon May 15, 2006 9:46 am 
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yeah im pretty sure if you go 19's itll be out

 

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Posted: Mon May 15, 2006 10:55 am 
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if you go the reccomended 245/35/19 tyre size it will be out only 3km/h.

 

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Posted: Mon May 15, 2006 6:06 pm 
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EL2XR8 wrote:
if you go the reccomended 245/35/19 tyre size it will be out only 3km/h.


Mine is out 7km/h ... thats with 235/45/19 instead of 205/65/15...but yeh the 17s would be dismal mate lik a 1Km

 

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