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

cooltoy · 04-10-2013, 02:40 PM

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! · 04-10-2013, 02:53 PM

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.

cooltoy · 04-10-2013, 03:01 PM

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

tjlazer · 04-10-2013, 03:03 PM

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

kenchan · 04-10-2013, 04:42 PM

Quote:

Originally Posted by 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)?

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

cossie1600 · 04-10-2013, 05:07 PM

To justify the 3k premium

cooltoy · 04-10-2013, 05:09 PM

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

DEpointfive0 · 04-10-2013, 05:17 PM

Quote:

Originally Posted by cooltoy

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

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

cooltoy · 04-10-2013, 05:19 PM

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

Waiz · 04-10-2013, 06:14 PM

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 · 04-10-2013, 06:58 PM

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

cooltoy · 04-11-2013, 09:19 AM

Quote:

Originally Posted by DEpointfive0

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

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 · 04-11-2013, 01:18 PM

Quote:

Originally Posted by cooltoy

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

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).

Cmike2780 · 04-11-2013, 01:32 PM

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

jcosta79 · 04-11-2013, 01:36 PM

Quote:

Originally Posted by 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.

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.

04-10-2013, 02:40 PM	#1 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,942 Drives: 14 PW 370Z S/T MT Rep Power: 240365	Nismo vs Sport - why same tire in front, but not in rear? 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)?

04-10-2013, 02:53 PM	#2 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	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. __________________ Enjoy it. Destroy it.

04-10-2013, 03:03 PM	#4 (permalink)
tjlazer A True Z Fanatic Join Date: Dec 2009 Location: Tacoma Age: 52 Posts: 2,496 Drives: Z34, R35 Rep Power: 19	Yeah it's just meatier on the rear for the Nismo, since it does have a wider wheel and 18 more horses. __________________ 2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

04-10-2013, 06:58 PM	#11 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7334	The diameter of the tire that fits at 10.5in and and 9-9.5 in is slightly different. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

04-11-2013, 01:32 PM	#14 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 28	Truthfully though, the speedo isn't acurate enough for any of that to matter as you're reasonably close to the same outside diameter. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

04-10-2013, 03:01 PM	#3 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,942 Drives: 14 PW 370Z S/T MT Rep Power: 240365	What about running the 275's on the 10.5 wheel?

04-10-2013, 05:07 PM	#6 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	To justify the 3k premium

04-10-2013, 05:09 PM	#7 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,942 Drives: 14 PW 370Z S/T MT Rep Power: 240365	So if I were to get some CE28 19X9.5 and 19X10.5, I should be able to use stock sport package tires?

04-10-2013, 05:19 PM	#9 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,942 Drives: 14 PW 370Z S/T MT Rep Power: 240365	Why would it do that? The diameter does not change. Is it the wider rim that would throw the speedometer off?

04-10-2013, 06:14 PM	#10 (permalink)
Waiz A True Z Fanatic Join Date: Apr 2010 Location: SoCal Posts: 9,262 Drives: Z33 & GE8 Rep Power: 459	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.

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