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Author any way to make speedo read correctly when putting alloys on car?
waynep
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Registered: 20th Apr 02
Location: london
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15th Jan 05 at 00:52   View User's Profile U2U Member Reply With Quote
well all i need to know is what tyre size wen using 15" wheels will make speedo more accurate? i found some nice deep dish ones in a decent offset
Ren
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Registered: 16th Oct 04
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15th Jan 05 at 00:53   View User's Profile U2U Member Reply With Quote
same here but with 17s.... if thats even possible
Adam_B
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15th Jan 05 at 00:55   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by corsa-crazy
well all i need to know is what tyre size wen using 15" wheels will make speedo more accurate? i found some nice deep dish ones in a decent offset


195/45 R15
Adam_B
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15th Jan 05 at 00:56   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Ren
same here but with 17s.... if thats even possible


not possible
waynep
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15th Jan 05 at 00:57   View User's Profile U2U Member Reply With Quote
so 195/45/15 would read almost accurate
Ian
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Registered: 28th Aug 99
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15th Jan 05 at 01:07   View Garage View User's Profile U2U Member Reply With Quote
Closest to factory size gives you a speedo reading which is closest to factory speedo error, so yes, 195/45 is a good choice (2.4% smaller) as is 195/50 (1.1% bigger)

To make the speedo read properly you would need to know what the factory error is, and you'd need to go fairly large. Speedos can legally read up to 10% more than you're actually going but even if you can fit a 205/60 under the arch it will look rubbish.

If you want an accurate speedo, get a PDA with GPS or a Road Angel or something. Don't use this as a reason to buy huge tyres.

[Edited on 15-01-2005 by Ian]
Ian
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Registered: 28th Aug 99
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15th Jan 05 at 01:12   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Ren
same here but with 17s.... if thats even possible
205/40/17 is 4.6% bigger than standard so you're probably nearly there.

You'll not get something small enough to give you the same reading as your factory tyres did though.

PS I'm assuming factory tyre is 1.4 Sport spec ie 165/65/14 (570mm rr) 165/70/13 are smaller again (561).
waynep
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15th Jan 05 at 01:21   View User's Profile U2U Member Reply With Quote
well these are the 15s im lookin to buy



but looks like its 205/60 lol
Ian
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15th Jan 05 at 01:22   View Garage View User's Profile U2U Member Reply With Quote
Might not need new tyres looking at that picture

That will look soooo bad unless you put skimpy tyres on.

You painting the centres I hope...
waynep
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15th Jan 05 at 01:26   View User's Profile U2U Member Reply With Quote
geting spokes black or anthra and maybe getting some streched rubber tyres to make them look euro somthing like 225/40/15 if poss (not sure) these are 7.5x15 i tihnk and are quite low offset so will defo look euro
waynep
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15th Jan 05 at 01:37   View User's Profile U2U Member Reply With Quote
big dish

Ian
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15th Jan 05 at 01:39   View Garage View User's Profile U2U Member Reply With Quote
I have 215 on an 8" rim, 225 won't look stretched on 7.5.

 
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