Nismo vs Sport - why same tire in front, but not in rear?

cooltoy

So as we all know the sport model comes with 19x9 in front and 19x10 in the rear.

Nismo comes with 19x9.5 in front and 19x10.5 in the rear.

How come both use the 245/40/19 in the front, but different tires in the back (275/35/19 for sport and 285/35/19 for Nismo)?

Jordo!

I believe the 285's will fit just fine on the 19x10 wheel, so I have to assume its simply that they gave the Nismo a bit more rubber in the back for better traction (i.e., another "upgrade" feature for the Nismo).

The fronts are less of an issue, as its the rears doing all the grunt work.

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cooltoy

What about running the 275's on the 10.5 wheel?

tjlazer

Yeah it's just meatier on the rear for the Nismo, since it does have a wider wheel and 18 more horses.

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kenchan

nismo has so much more power than the base, the 10mm extra rubber is required.

cossie1600

To justify the 3k premium

cooltoy

So if I were to get some CE28 19X9.5 and 19X10.5, I should be able to use stock sport package tires?

DEpointfive0

Yeah, you'll have a little stretch and your speedo will read like 2-4% faster than you're actually going

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cooltoy

Why would it do that? The diameter does not change. Is it the wider rim that would throw the speedometer off?

Waiz

I didn't design the NISMO but I'm sure that the designers decided on a wider tire since it is supposed to be the higher performance version of the 370z

Regarding your CE28's, you are correct if the diameter doesn't change it has no affect on anything else.

SS_Firehawk

The diameter of the tire that fits at 10.5in and and 9-9.5 in is slightly different.

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cooltoy

Would anyone have any pictures of what this would look like by any chance? Especially the rear. I guess the front would look like a stock Nismo.

jcosta79

The OD (Overall Diameter) of your tire changes depending on the brand and aspect ratio.

A 275/35/19 tire does not have the same OD as a 285/35/19 tire does. The inside diameter is the same because it needs to fit a 19 inch wheel, but the OD changes.

Look here: Bridgestone*Potenza RE050A

The OD of the stock 275/35/19 Potenza RE050A is 26.5".

Now here: Yokohama*ADVAN Sport

The OD of the stock NISMO 285/35/19 Yokohama Advan Sports are 26.9".

That is why, generally, for every 20 mm of width that you go up in a tire, you need to go down a level in aspect ratio. For example, I should be able to run a 305/30/19 on my car and still be pretty close to the factory OD (depending on tire manufacturer).

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Cmike2780

Truthfully though, the speedo isn't acurate enough for any of that to matter as you're reasonably close to the same outside diameter.

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jcosta79

It matters to the VDC. Put on tires that are too far off from the OEM OD and you will have the VDC kicking in all the time.

Ask me how I know.

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2012 PW NISMO #0559 - GT Spec Brace Kit - Swift Springs - ARK TP & Invidia CBE K&N Intake - UpRev Tune - 15mm Z1 Spacers & Studs - StopTech Slotted Rotors & SS Lines - ZSpeed CMAK with Stage 2 Clutch and Lightweight Flywheel