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Best Tire for GTR


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#141 franc01

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Posted 07 September 2020 - 10:03 PM

Thank you AutoXGTR for your thorough explanation, makes sense that the stock size rear wheel will only go so far before the increasing tire width is extra weight with no benefit. At some point I will likely go with aftermarket wheels in the proper width and offset to properly go larger but for now Id like to optimize the stock wheels. Looking back at the specs, what do you think about going to 295/35 front and 305/35 rear? I already have the 295s on the rear, with low miles on them, if I swap them to the front and go 305/35 rear then it looks like the diameters and revs per mile would be 28.1/740 front and 28.4/732 rear. I am assuming the slightly larger diameter compared with stock should be OK since I am on stock suspension and looks like its a 1.1% difference front to rear in terms of revs per mile. It also looks like people have gone 295 square on the stock wheels so it looks like front fitment should be OK.

#142 AutoXGTR

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Posted 07 September 2020 - 11:05 PM

Yes, it is possible to use the combination you suggest. Tire diameters are OK

 

295/35-20 $388 each, fits wheels 10-11.5" wide, perfect for 10.5" wide rim, tire diam 28.1", 30 lbs. each, XL load rated (stiffer sidewall)

305/35-20 $377 each, Limited Stock, fits wheels 10-12" wide, perfect for 11" wide rim, tire diam 28.4", 31 lbs. each, Standard load rated

 

A note on load ratings, the XL load rated tires are constructed with a stiffer sidewall to carry more load which gives the tire as slightly firmer ride and better handling responsiveness. 35 series sidewall is relatively stiff.

Using a 295 mm wide tire on the front OEM wheel will work, the tire will fit on a 1/2" more narrow rim but may require a little more technique by your mechanic. An experienced person should be OK but if it is their first time then it could be a struggle. I think you may find that the wider tire sizes are slightly better for what you want. Some owners report that an extra wide front tire size makes the steering feel sluggish and heavy but I think that is mostly with slower driving.


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#143 Hellfromabove

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Posted 06 October 2020 - 10:52 PM

Looking at getting one of the following Nitto tires:

 

- NT555

- Invo

- Motivo

 

I try and find them on the tire websites, but it doesn't seem like they show up when a GTR is selected. I'm trying to fit these on a 2015 GTR with OEM wheels and suspension. What sizes should I be searching directly and what is the best site to purchase? I take it that a normal shop would not normally install these (since they don't show up through the normal search) and I'd have to take them to my tuner? Thanks in advance.



#144 Daddy21

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Posted 07 October 2020 - 01:37 AM

Looking at getting one of the following Nitto tires:
 
- NT555
- Invo
- Motivo
 
I try and find them on the tire websites, but it doesn't seem like they show up when a GTR is selected. I'm trying to fit these on a 2015 GTR with OEM wheels and suspension. What sizes should I be searching directly and what is the best site to purchase? I take it that a normal shop would not normally install these (since they don't show up through the normal search) and I'd have to take them to my tuner? Thanks in advance.


This are the ones you need.
NT555 G2
275/40/20 ZR
315/35/20 ZR


Sent from my iPhone using Tapatalk

#145 Automotive.Cocaine

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Posted 07 October 2020 - 02:12 AM

New R888R are horrific, the olde gen R888 was perfect for the R35
Now they suck, the whole setup doesnt fit right. Circumference etc you know the ets problems.
Come on

#146 Hellfromabove

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Posted 07 October 2020 - 03:25 AM

This are the ones you need. NT555 G2 275/40/20 ZR 315/35/20 ZR Sent from my iPhone using Tapatalk

Awesome, thank you!



#147 Kevin

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Posted 07 October 2020 - 08:35 AM

New R888R are horrific, the olde gen R888 was perfect for the R35
Now they suck, the whole setup doesnt fit right. Circumference etc you know the ets problems.
Come on

This is not true at all. I and many others run them in 285/35/20 and 325/30/20 and there aren't any issues at all. I have them on stock DBA wheels as well. On my second set now.



#148 Hellfromabove

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Posted 07 October 2020 - 07:30 PM

American Tire Depot was having a deal on B3G1 on all tires. Thought I'd be coming up with getting the Motivos from there. Called for a quote and the extra "mandatory fees" and taxes almost doubled the price. Should be going to a place like American Tire Depot to get the tires installed or someplace else? Called another place down the street from me and they quoted about $60 less than ATD. However, trying to see if I can really come up on the promotion they have or if it's just some gimmick.



#149 bi9guns

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Posted 07 October 2020 - 08:18 PM

Just spent 8, 23 minute track sessions at Cresson Motorsports Ranch on potenza re71r, oem sizes, oem wheels. Great traction, and crazy corner grip.

#150 Automotive.Cocaine

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Posted 08 October 2020 - 01:38 AM

This is not true at all. I and many others run them in 285/35/20 and 325/30/20 and there aren't any issues at all. I have them on stock DBA wheels as well. On my second set now.


This setup is not available in Europe.
Calm down soya man

#151 Kevin

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Posted 08 October 2020 - 04:39 AM

This setup is not available in Europe.
Calm down soya man

You seem to be the one who needs to calm down from your previous post. Seemed really worked up about the toyos causing you issues :(

Edited by Lordkevin, 08 October 2020 - 04:39 AM.


#152 KsabDarren

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Posted 22 February 2021 - 07:46 AM

19" rims for winter?  has anybody used 19"



#153 AutoXGTR

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Posted 22 February 2021 - 04:55 PM

19" rims for winter?  has anybody used 19"

 

Yes, it is possible.

 

Problem is GTR wheels are staggered so it might be hard to find one wheel size with an offset that works for both front and rear. What fits the rear will stick out more in the front. It is posible to choose an offset for the front and add a wheel spacer for the rear.

 

No need to go with extra wide wheels 19x9 to 19x9.5" could work and it might be harder to find wheels in that diameter that are wide enough.

 

Example of wheel

Work Emotion M8R Deep concave (Bronze, Matte Black, White, Gloss Black) listed at Vividracing.com

19x9.5" offsets from 12mm, 25mm, 38mm, about $500 each

 

Compared to OEM wheels these will fit-

Front with 38mm offset - rim will poke out 7mm farther, tire will poke out 17mm farther, otherwise clearance is good

Rear with 12mm offset - rim is same as OEM, tire will poke out 8mm farther, clearance is good

These wheels with different offsets would work with 275/40-19 tires for front and rear tire diameters to be equal.

 

Tire sizes need to be close to OEM tire diameter of 28" for both front and rear. If you have the same wheels on front and back you can choose a tire size that fits that wheel and should be ok for front and back clearance if you have OEM suspension.

 

If you want wider wheels then one option is to select the same wheel in 19x10.5" et 22 which will fit like an OEM wheel and still accept the 275/40-19 tire.

Or you can run the same wheel but wider in front wheel like 19x10.5" et 32 but the wheel will poke out 

26mm more which is slightly beyond flush.

 

in general wider wheels in deep snow won't cut through as easily- consider your winter conditions and see-

http://racetrackdriv...wide-vs-narrow/

 

example winter tire-

Bridgestone Blizzak LM-32

275/40-19 $320 each, fits wheels 9-11" wide, perfect for 9.5" wide rim, tire diam. 27.7"

or

Pirelli Winter Sottozero 3

275/40-19 $387 each, standard load rated, tire diam. 27.7"

or in a Runflat

Pirelli Winter Sottozero Serie II runflat

275/40-19 $438 each, XL load rated, tire diam. 27.8" for extra safety of flat tire in winter or traffic

 

Tirerack winter tire test

https://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=181  


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#154 XLR8LV

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Posted 23 February 2021 - 12:49 AM

New R888R are horrific, the olde gen R888 was perfect for the R35
Now they suck, the whole setup doesnt fit right. Circumference etc you know the ets problems.
Come on

 

 

Was this ever confirmed to be a Valid point?

 

What size was this statement talking about? This post is lacking facts and specifics. 

 

 

Are we even compare apples to apples here ?

 

285/35/20 and 325/30/20  Has been said to work for many owners. 



#155 AutoXGTR

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Posted 23 February 2021 - 03:56 PM

 

 

Was this ever confirmed to be a Valid point?

 

What size was this statement talking about? This post is lacking facts and specifics. 

 

 

Are we even compare apples to apples here ?

 

285/35/20 and 325/30/20  Has been said to work for many owners. 

Yes, more details would be helpful.

 

Toyo R888R are the current model of streetable Track race tires while R888 was the older model.

 

R888 isn't available at tirerack.com in 20" sizes, selection is very limited.

 

R888R

325/30-20 fits rims 11-12" wide, perfect for 11.5" wide rim so not good fitment for OEM rear wheel 20x10.5".

For OEM wheels

Front 285/35-20 fits 9.5-11" wide rims, perfect for 10" wide rim, tire diam. 27.9"

Rear 315/30-20 fits 10.5-11.5" wide rims, perfect for 11" wide rim, tire diam. 27.5"

 

Tire size and fitment could be a factor as well as intended use and on what track surface.

 

Condition and age of tires as well as track and environment conditions are relevant.

 

Comparison of R888 vs R888R

https://www.turnolog...mpetition-tire/

https://dsportmag.co...ire-evaluation/

 

Tirerack owner survey for track tires

https://www.tirerack...play.jsp?type=C


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2009 GTR Premium Gun Metallic/ Black Leather #2361

#35 Street Modified Class Solo SCCA Hawaii Region 2020-21
2009-2021 Season Points and Runoff Champion(ASP 2009-12/SSP 2013/Street Modified 2014-19/2nd Points SM 2020, 2nd Runoff SM 2016-17)
2009-2014 Season Pax Overall 12th tied 2010/ 13th tied 2011/ 10th 2012/ 10th tied 2013/10th 2014


#156 White_turbo

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Posted 26 February 2021 - 06:56 PM

285/35/20 and 325/30/20  Has been said to work for many owners. 

 

Unfortunately, the reality is you will never be able to confirm unless you try it yourself.  On paper, those sizes are very close that you would think it shouldn't cause any issue, but there are people saying this set up fry the ETS.  The general "rule of thumb" is the front/rear circumference needs to be within 3%, but there is no scientific proof on this.  On the other hand, those that had problems with the R888 in those sizes, who knows what they have done to the car and what kind of abuse the car goes through (i.e. the problem may not actually be caused by the tires, but something else and just a coincidence the last things changed on the car were the tires).

 

At the end of the day, you are just left with information that are all over the place.  So you either try it yourself or run square or OEM sizes just to be safe. 


Edited by White_turbo, Today, 08:42 AM.

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