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Author speedos and bigger wheels ?
antonOO2
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Registered: 17th Sep 02
Location: Midlands
User status: Offline
27th Jun 04 at 16:01   View User's Profile U2U Member Reply With Quote
i was doing about 75 constant by my speedo on the bypass the other day,and i was traveling with a 106.when i stopped the 106 driver sed he was doin 85.Got me a bit worried now ,can stnd to 17" wheels make that much difference?

cheers
anton
Dean_H
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Registered: 19th May 02
Location: Rhondda Cynon Taff
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27th Jun 04 at 16:03   View User's Profile U2U Member Reply With Quote
i went from standard 15" to 17" and didnt change hardly nothing

But if you went from 13" steelies to 17" it might change quite alot.
Only way you gonna find out is if you follow 2 or 3 people and at the same speed. if they all say your doing 85 well you better get it sorted out.
antonOO2
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Registered: 17th Sep 02
Location: Midlands
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27th Jun 04 at 16:05   View User's Profile U2U Member Reply With Quote
yeh i know got me worried abit now ,it was from 13" to 17"

gonna take it in to be sorted i think
Black Corsa SRi
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Registered: 25th May 02
Location: ---Stockport---- Drives: Pug 206 Roland Garros
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27th Jun 04 at 16:18   View User's Profile U2U Member Reply With Quote
there is a site that peoepl have posted up whre u put in your old wheel and tyre sizes and new and it'll tell u how much your speedo will be out by but cant remeber the link but if u do a search on here u'll find it easily, i'd say 13 to 17 is def gonna make a dif though mate
antonOO2
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Registered: 17th Sep 02
Location: Midlands
User status: Offline
27th Jun 04 at 17:09   View User's Profile U2U Member Reply With Quote
Cheers
found the site
it said when the speedo say 60 i am realy doing 67
Ian
Site Administrator

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Registered: 28th Aug 99
Location: Liverpool
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27th Jun 04 at 17:13   View Garage View User's Profile U2U Member Reply With Quote
Factory speedos over-read, you've most likely made yours more correct by fitting bigger wheels. The only way to be sure is to us GPS to get a proper idea. While you're there do it in the 106 and surprise him as well.

[Edited on 27-06-2004 by Ian]
antonOO2
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Registered: 17th Sep 02
Location: Midlands
User status: Offline
27th Jun 04 at 17:20   View User's Profile U2U Member Reply With Quote
cheers ian ,ive had 17"s for about year and a half now and ive never been pulled or flashed by a camera.it was just when he sed 10 mph out i though that is a fair bit .
might try it with some other cars and see what there speedos say
Captain_Rosco
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Registered: 8th Dec 03
Location: Reading - Berkshire
User status: Offline
27th Jun 04 at 17:37   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by antonOO2
Cheers
found the site
it said when the speedo say 60 i am realy doing 67


Whats the link to this site ???
antonOO2
Member
Registered: 17th Sep 02
Location: Midlands
User status: Offline
27th Jun 04 at 18:01   View User's Profile U2U Member Reply With Quote
had a few requests ,so here is the link

http://miata.net/garage/tirecalc.html

 
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