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Old 03-01-2011   #1
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HELP! Just bought alloys with 195/45/R16 tyres

Hey chaps,

I just bought some 16" alloys which have 195/40/R16 tyres on them, will this cause any probles with regard to the speedo readings I get or anything else?

Thanks,
Chris
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Old 03-01-2011   #2
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Re: HELP! Just bought alloys with 195/45/R16 tyres

Sorry the thread title is wrong, they are 195/40/R16 !! I know the same rolling radius should be 195/45/R16
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Old 03-01-2011   #3
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Re: HELP! Just bought alloys with 195/45/R16 tyres

You just answered your own question then, if the rolling radius is different the speedo will be out and they might well clip the arches too on full lock.
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Old 03-01-2011   #4
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Re: HELP! Just bought alloys with 195/45/R16 tyres

Yes your speedo will be knocked out of accuracy.

Because the rolling radius is smaller that what the speedo was calibrated for it will think you are going quicker than you are.

Best thing to do is get rid of the tires and get 195/45's put on. Im in the process of looking for 195/45 R16's now for my 500 alloys

If you dont fancy doing that you can also get your speedo re-calibrated. the cheapest way of doing it is driving with a satnav with speed indication or go past on of those Street signs which show your speed. that will show you the percentage that your speed is out to the indicated speed
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Old 03-01-2011   #5
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Re: HELP! Just bought alloys with 195/45/R16 tyres

Quote Originally Posted by Eklipze3k View Post
You just answered your own question then, if the rolling radius is different the speedo will be out and they might well clip the arches too on full lock.
dont see why they would clip the arches...

195/45/16 will fit fine without clipping (depending on offset)

195/40/16 have a smaller profile so less rubber meaning less to clip the arches than the 195/45
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Old 03-01-2011   #6
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Re: HELP! Just bought alloys with 195/45/R16 tyres

I was typing in a rush and thought they were bigger profile rather than smaller
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Old 03-01-2011   #7
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Re: HELP! Just bought alloys with 195/45/R16 tyres

Quote Originally Posted by Eklipze3k View Post
I was typing in a rush and thought they were bigger profile rather than smaller
No worries, was slightly confussed by that post. but that makes sense now
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Old 03-01-2011   #8
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Re: HELP! Just bought alloys with 195/45/R16 tyres

Quote Originally Posted by Teix View Post
Sorry the thread title is wrong, they are 195/40/R16 !! I know the same rolling radius should be 195/45/R16
Your speedo will read fast and the car will accelerate quicker as 195/45R16 is roughly the right radius for these cars
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Old 03-01-2011   #9
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Re: HELP! Just bought alloys with 195/45/R16 tyres

Thanks for the help guys, much appreciated
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