Kiddy_Corsa
Member
Registered: 7th Nov 02
Location: Kidderminster Drives: Astra VXR
User status: Offline
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my 1.6 16v corsa sport was on 17's, and i couldnt keep up with my brother's 1.4 8v on the straights when he was on 14's 
put my 14's back on, and i left him!
[Edited on 09-04-2006 by Kiddy_Corsa]
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alistairolsen
Member
Registered: 21st Jan 06
Location: glasgow
User status: Offline
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175/65 14 tyre has a rollinr radius of 14x 25.4 + 2(0.65x175) which is 583.10mm. this is the ideal as it wont throw your speedo out.
17 inch rim is 431.8 leaving 151.3mm for tyre sidewall.
you wont find many 17s tht are less than 7 inches wide, and no one runs tyres narrower than 195.
151.3/2 is 75.65mm sidewall, which is 39% of 195.
So, best case you can get them to match if you use 40 profiles on a 195 tyre on a 7 inch rim with the correct offset.
Now look at the folk running 17s, who has et49, who has a 7 inch rim or narrower, who runs 195s? anything wider then 195 and your looking at 35 profiles which are expensive and ride terribly (IMO I wouldnt have 40, but there you go!)
With 18s youre down to 30 profiles, and 19s are simply impossible without roayally screwing everything!
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Sam
Moderator
Premium Member
Registered: 24th Dec 99
Location: West Midlands
User status: Offline
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Will I get better performance if I put 22.5" wheels on my car like these?
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K2 GTi
Member
Registered: 21st Oct 04
User status: Offline
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no, thats just stupid
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