Tyre sizes
04-21-2005, 02:45 AM
#1
In between cars, RX8-less
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Tyre sizes
Hey there fellas thought I would post this FYI, I found it whilst looking around the net, might come in handy for some.
It does a comparison of tyres sizes including diameters and % difference.
http://www.tyresave.co.uk/tyresize.html
Gibbo
It does a comparison of tyres sizes including diameters and % difference.
http://www.tyresave.co.uk/tyresize.html
Gibbo
04-21-2005, 05:52 AM
#3
New Member
From the Miata site, this is very similar with some illustrative work
I like the bottom text box where I can put more than 1 size and generate a table.
http://www.miata.net/garage/tirecalc.html
I like the bottom text box where I can put more than 1 size and generate a table.
http://www.miata.net/garage/tirecalc.html
04-21-2005, 08:30 AM
#4
cry me a river...
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Originally Posted by takahashi
From the Miata site, this is very similar with some illustrative work
I like the bottom text box where I can put more than 1 size and generate a table.
http://www.miata.net/garage/tirecalc.html
I like the bottom text box where I can put more than 1 size and generate a table.
http://www.miata.net/garage/tirecalc.html
04-21-2005, 03:35 PM
#5
Registered User
Interesting.. It says that you have to replace a 225/45 18 with a 255/40 18 to get the best speedo match, but would a 255 tyre even fit in the wheel arches? 
04-21-2005, 04:45 PM
#6
New Member
The answer is not recommended. I know people have fit a 275 in a 8" but will you do that!?
On the other hand I am more willing to put it in a 8.5" or a 9" though..... 255/40 is such a weird size and I doubt there are many manufacturer has this size.
On the other hand I am more willing to put it in a 8.5" or a 9" though..... 255/40 is such a weird size and I doubt there are many manufacturer has this size.
10-15-2007, 07:25 PM
#9
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I have 245/40/18's on mine, and I understand that 245's are the widest you can put on an 8" wide rim (on the other hand, I was told that 225's are the narrowest you can put on a 8" rim).
Plus factors: The error is minimal, and the tyres look really great - they're so wide!
Minus factor: You have to increase tyre pressure to 250-260kPa to avoid squirming and improve turn in. After about 15-20000km, squirming does not appear to be a problem (at least in non-track situations).
Plus factors: The error is minimal, and the tyres look really great - they're so wide!
Minus factor: You have to increase tyre pressure to 250-260kPa to avoid squirming and improve turn in. After about 15-20000km, squirming does not appear to be a problem (at least in non-track situations).
10-15-2007, 07:28 PM
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10-17-2007, 02:03 AM
#11
Hmmmmmm.........
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Well appart from the strangeness in looks as Cromax pointed out, you will be running your speedo nearly 3% to low.
Con: you are going faster than your speedo says (when you speedo says 100 your actually doing 103)
Pro: you are doing less km's than the odometer says (When your odometer says you have traveled 100km you have actually done 103).
Con: you are going faster than your speedo says (when you speedo says 100 your actually doing 103)
Pro: you are doing less km's than the odometer says (When your odometer says you have traveled 100km you have actually done 103).
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