jm960326
Member
Registered: 24th Aug 02
Location: Rob Cheshire
User status: Offline
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As above basically, 19s alter the reading quite a bit- bout 15% aprox I think, IE 70mph reads as about 60mph on speedo so Im told. There is a website that tells you what the difference is.
Basically can you get the speedo calibrated to the new sized wheels so dont get caught speeding basically.??
Cheers
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Noonster
Member
Registered: 20th Jul 03
Location: East Yorkshire
User status: Offline
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The website that will tell you the differences it:
http://www.chris-longhurst.com/carbibles/index.html?menu.html&tyre_bible.html
And as far as I know you can't get the speedo calibrated...... its the price you have to pay for haveng nice big alloys 
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jm960326
Member
Registered: 24th Aug 02
Location: Rob Cheshire
User status: Offline
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Cheers for that. Anyone else know if it can be reset??
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luca2020
Member
Registered: 26th May 02
Location: Maidstone, Kent
User status: Offline
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it can be re-set, im sure of it, but cant remember where and how much it costs
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Andy GSi
Member
Registered: 24th Mar 02
Location: Shropshire, Drives 2.0l 16v Corsa
User status: Offline
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alter the speedo urself! when i was changing my dials! i had to remove the speedo arms, and when i put them bk on, i had to follw a mate to get a rough speed! but i have 17" on now, had 15" when i did that! so god nows how fast i'm going!! just tell by the revs
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jm960326
Member
Registered: 24th Aug 02
Location: Rob Cheshire
User status: Offline
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This is going to be 19s so from what I can gather, when the speedo reads 70mhp I'll be doing around 81 ish. Might ask Vauxhall or ABP if they can alter it or set it up.
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