Tyre sizes affecting speedo reading.
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Scooby Regular
Joined: Jun 2002
Posts: 2,037
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From: The home of the game played with odd shapped balls
I am waiting on some OZ Super L's 17x7. I am currently rinning 16" wheels with 205/50/r16 tyres on my 95 wrx import.
The Speedo is reading correct afaik as the car was SVA'd with the 16" wheels on it.
When I change to the Super L's will the extra inch affect the speedo readings or can I compensate by using a lower profile tyre. If so which Size tyres would I need?#
many thanks
Pete
The Speedo is reading correct afaik as the car was SVA'd with the 16" wheels on it.
When I change to the Super L's will the extra inch affect the speedo readings or can I compensate by using a lower profile tyre. If so which Size tyres would I need?#
many thanks
Pete
Scooby Regular
Joined: Jan 2001
Posts: 6,812
Likes: 1
From: West Sussex
Pete,
Pay attention now!!
You will need 215/40 17 tyres to keep the same rolling radius and therefore keep the speedo reading correctly
See: http://www.miata.net/garage/tirecalc.html
Pay attention now!!
You will need 215/40 17 tyres to keep the same rolling radius and therefore keep the speedo reading correctly
See: http://www.miata.net/garage/tirecalc.html
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