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Corsa Sport » Message Board » General Chat » any way to make speedo read correctly when putting alloys on car? » Post Reply

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Ian

 posted on 15th Jan 05 at 01:39

I have 215 on an 8" rim, 225 won't look stretched on 7.5.


waynep

 posted on 15th Jan 05 at 01:37

big dish


waynep

 posted on 15th Jan 05 at 01:26

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


Ian

 posted on 15th Jan 05 at 01:22

Might not need new tyres looking at that picture :lol:

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

You painting the centres I hope...


waynep

 posted on 15th Jan 05 at 01:21

well these are the 15s im lookin to buy



but looks like its 205/60 lol


Ian

 posted on 15th Jan 05 at 01:12

quote:
Originally posted by Ren
same here but with 17s.... if thats even possible :o
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).


Ian

 posted on 15th Jan 05 at 01:07

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]


waynep

 posted on 15th Jan 05 at 00:57

so 195/45/15 would read almost accurate


Adam_B

 posted on 15th Jan 05 at 00:56

quote:
Originally posted by Ren
same here but with 17s.... if thats even possible :o


not possible


Adam_B

 posted on 15th Jan 05 at 00:55

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


Ren

 posted on 15th Jan 05 at 00:53

same here but with 17s.... if thats even possible :o


waynep

 posted on 15th Jan 05 at 00:52

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