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18's to 17's - size advice please

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Old 08 June 2011, 10:55 AM
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dj_akademix
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Default 18's to 17's - size advice please

I have a GB270 wagon with Godspeed original size replacement disks and pads. I am looking to buy a set of 17' alloys for my winter commuting (50mile round trip...).

Looking in the manual, I think my car has 7.5x18's and I know i'm on 225/40/18 rubber.

Not knowing much about anything when it comes to alloys:
1) What size rims should I be looking for - 7.5x17, 5x100???
2) What size rubber do I need to keep the rolling radius the same?

has anyone put together a piece explaining rim size, fitting and rubber size for different years of impreza?
Old 08 June 2011, 11:11 AM
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CREWJ
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This should help;

http://www.jettyres.co.uk/tyre-tips/tyre-markings/

The 7.5 is the width of the rim in Inches.

The 5x100 is the number of wheel studs (5) and the pitch circle diameter (PCD = 100mm)

Last edited by CREWJ; 08 June 2011 at 11:14 AM.
Old 08 June 2011, 12:01 PM
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dj_akademix
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Cool - thank you, a handy guide!
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