245s vs 255s...

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Jan 22, 2015 | 09:39 PM

#11

06Estukay

Joined: Aug 2010

Posts: 2,439

Likes: 9

From: Toronto

Quote:

Originally Posted by grubinski

Quote:

Originally Posted by 06Estukay' timestamp='1421956251' post='23477825

For me, I've found that tracks with long, open straights, the narrower/smaller diameter tires have a top speed advantage.

Unless you're measuring your speed with GPS, the difference you're talking about might just be the change in speedometer calibration.

Yeah, because I actually look at my speedometer while on track

Of course its a GPS logger.

Jan 25, 2015 | 09:06 AM

#12

Apex1.0

Joined: Jul 2013

Posts: 1,128

Likes: 19

Quote:

Originally Posted by s2000Junky

For a 9" wide rim, the 245 would be more optimum a profile. There will be less sidewall deflection so the handling is going to feel tighter and more precise. I run a 255 up front, but I pair it with 10" wide rim for the same reasons stated for the 245/9".

You could consider running a staggered 245/255 on a non stag 9" as well.

Doesn't the CR come with 255 on 8.5" wheels stock?

Jan 28, 2015 | 12:27 AM

#13

gptoyz

Joined: Jul 2012

Posts: 1,452

Likes: 23

Quote:

Originally Posted by Apex1.0

Doesn't the CR come with 255 on 8.5" wheels stock?

Yes and the ap2 runs a 245 on the same 8.5" rim

255 can be run on the 8.5"

Just as a 225 can be run on a 7" wheel, but a 205 is a more optimal fitment for the 7"...so would a 245 fit best with a 9" or a 255 to a 9.5"

The more optimal the fitment, the better the increased steering feel and handling of the car. When the tire is mounted to a narrow, less optimal, fitment the steering feel will become more vague with the excessive sidewalk deflection.