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Does wheel size effect speed??

sincy

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got a VZ ute with the 15" chasers.. just bought some 19 wheels.. will there be a big difference, if any in the speed/acceleration/anything else i should know about.. and is there a way to fix it??

cheers
 

HARVZ-6

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roller diameter is not much different.. speed will be slightly out most likely

can be recalibrated to suit by holden
 

sincy

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roller diameter is not much different.. speed will be slightly out most likely

can be recalibrated to suit by holden
thanks.. will the speed be higher or lower???
 

MUT4NT

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its either way usually
 

Exidor

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If the tyres are of a larger diameter than stock your speedo will show
a lower reading than true. eg 10% larger diameter tyres =10% lower KPH approx.
Also larger diameter tyres will be like lowering (taller) your diff ratio.
ie your rpm will now drop at a given speed.
 

murph_1989

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go to holdens and get it recalibrated

if u go bigger ur speedo will show a lower speed that what you are doing
dont ask me the margain etc
 

Travy

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All depends on overall diameter not just wheel size.

The tyre size calculator listed above tells you exactly the percentage its out by.
 

TUF UTE

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i dont believe holden can recalibrate it .... not if it has more than 12 kilometres on it. i may be wrong though.
 

ducker85

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roller diameter is not much different.. speed will be slightly out most likely

can be recalibrated to suit by holden

WRONG

the rim size wont affect your speedo until you get 20's or larger, as long as you run the correct tyre profile, the 19's are actually 100% perfect for yuor over all diameter were the 18's are 2mm smaller affecting the speed the slightest

i know anything that come factory on 15's in the ex models can run 19's fine, the VE changed there tyre profile and you can get 22's on them before affecting the speedo

to go further if you fir the incorrect tyre profile to your stock factory wheel this will f*ck up your speedo more then the 19's will
 
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