Michelin Pilot Alpin 225/40R18
11-26-2003, 05:47 AM
#1
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Michelin Pilot Alpin 225/40R18
Hello,
I ordered for my RX-8 the Michelin Pilot Alpin 225/40R18.
I'm not a tire GURU, did I ordered the right size ? I'm just concerned about the 40 instead of 45...!
Thanks
Simon.
I ordered for my RX-8 the Michelin Pilot Alpin 225/40R18.
I'm not a tire GURU, did I ordered the right size ? I'm just concerned about the 40 instead of 45...!
Thanks
Simon.
11-26-2003, 05:50 AM
#2
40 will make the tyre lower profile than the normal tyres.
And according to http://www.miata.net/garage/tirecalc.html your speedo will read 3.4% to fast.
It'll probably adversly affect your cars handling and mebee make it easier to damage your wheels too. And you may also need different(higher?) tyre pressure.
Edit : -
Tyre numbers :
225 - width in mm.
40 or 45, tyre wall height as percentage of width, i.e. 50 is half the width as wall height.
And according to http://www.miata.net/garage/tirecalc.html your speedo will read 3.4% to fast.
It'll probably adversly affect your cars handling and mebee make it easier to damage your wheels too. And you may also need different(higher?) tyre pressure.
Edit : -
Tyre numbers :
225 - width in mm.
40 or 45, tyre wall height as percentage of width, i.e. 50 is half the width as wall height.
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