Changing tire sizes

Apr 28, 2012 | 06:52 AM

Huelesnay

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Huelesnay is infamous around these parts

Changing tire sizes

Original tires in my 2009 997 were 8.5 x 19 in front and 295 x19 in rear. I'm looking to go to 245's in front and 305's in back?

Anybody have an opinion on how this affect the ride?

Apr 28, 2012 | 08:38 AM

MBENZF1

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What car do you have? C2 C4 Turbo?

Are you looking to stay on 19's? if so, 235 fronts and 305 rears, 245 if you go to a 20" rim.

Apr 28, 2012 | 04:36 PM

Alan C.

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You can put a 245.35 on an 8.5" wheel but a 9" is better. Take a look at Tire Rack in the tire specs to see what sizes fits your wheels.

PM Damon and he should be able to help.

Apr 28, 2012 | 06:29 PM

OKB

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you need to stay with 235/35 because 245 will be higher

Apr 28, 2012 | 06:36 PM

Alan C.

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If the OP goes 245.35.19 with 305.30.19 the diameters will be within the delta window. I used the same on my 09 C2S without issue.

Apr 28, 2012 | 07:15 PM

amge63

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This is what I often consult for my tire size changes. You can play with the width and aspect ratios to optimize your desired outcome.

http://www.miata.net/garage/tirecalcold.html