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Author Topic: Replacing 16" alloy with 17"  (Read 2159 times)

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Andy B

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Re: Replacing 16" alloy with 17"
« Reply #15 on: 28 December 2008, 00:15:51 »

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......
the percentage ratio is a percentage ratio of the total width of the tyre though...
I know!  :y



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i had an interesting time working out what tyre ratios the tyres should be on different size wheels and different width tyres...fun being the operative word :P
Why? :-/ there's plenty of sites - quoted here many times - that'll do the sums for you.  :y  :y  :y
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TheBoy

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Re: Replacing 16" alloy with 17"
« Reply #16 on: 28 December 2008, 09:57:31 »

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There is a setting for wheel sizes on instrument panel and MID/GID/CID, with 195/65/15,235/45/17 on one setting, and 225/55/16 on another.

But ...... how will your car know? If the running diameter is the same-ish, and the speedo is the same-ish, then surely what the MID thinks is on the car is irrelevent?????  :-/   :-/  :-/  :y
I can only assume that as GM have programmed these differently, they think there is a difference
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ngrainqey

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Re: Replacing 16" alloy with 17"
« Reply #17 on: 28 December 2008, 18:52:12 »

Quote
Quote
......
the percentage ratio is a percentage ratio of the total width of the tyre though...
I know!  :y



Quote
i had an interesting time working out what tyre ratios the tyres should be on different size wheels and different width tyres...fun being the operative word :P
Why? :-/ there's plenty of sites - quoted here many times - that'll do the sums for you.  :y  :y  :y

sorry andy.. i thought i'd be a geek and work it out on a piece of paper :P
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V8!!!!
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