R32 GTR tyres sizes your help required

[wrx.co.uk]

I have been getting very useful advice in another thread about what tyre sizes are right for a R32 GTR.

This car is definitely and R32 GTR and not a GTS

This is the sticker on the door pillar

Lee.

It shows front being narrower and higher profile ( I think)
So could all R32 owners please, please, come on I am begging now, let us know what tyres are fitted to your car, and what does the sticker on the door pillar state.

OH, and no guess work please!!!

Thanks in advance everyone

[SkylineUSA]

225/50 16 = height 24.9
side wall 4.5
width 8.9

205/55 16 = Height 24.9
side wall 4.9
width 8.1

My GTR is gone right now, as soon as it gets back I'll take a look and see what the door says.

[SkylineUSA]

Oh and this is not guess work

I looked for the pics you were posting, but I could not find them, can you post a link, thanks.

Tony

[DCD]

That sticker is stating at what pressure the tyres should be inflated to. There is no mention which one is in the front or rear. The third tyre listed is the spare.

Hope this helps

[Emre]

R32 Gtr came out with 225/50/16 inch tyres on 16 x 8 rims.
205's would be too small on 8 inch rims.

Autech 4 door gtr however, came out with 205/55/16 inch tyres as did the Gts-t's and Gts-4's.

I am guessing the sticker in the door pillar is to cover all R32's that came out with 16" wheels, not just the gtr. I also think front and rear is split vertically rather than horizontally as in 2.3kg/cm front and 2.3kg/cm rear.

[bobban]

As of my knowledge you should NEVER mix tyre sizes on a 4WD Skyline. Especially not between the rear and front.. The difference in wheel rotation speed will fool the ATESSA computer to activate the ETS-clutch thus quickly wearing it down.

Regards
Lars B.

[wrx.co.uk]

Thanks, should have thought of that realy, its the same on scoobies, it justy shows tyre pressures front and back for each tyre size - makes sense.

This does not help me out though, what tyres should I fit on the front with 17" rims??

[Project 400]

Nismo catalogue seems to suggest 245/45/17 for a BNR32

Y.

[davewilkins]

Depends on the width of your wheels. The standard wheels are 16x8 and I used 225 50 tyres and I now have 18x8 and use 235 40 tyres. I guess that I will use either 225 or 235 45 when I fit 17's if they are 17x8. Hope that is of some use.
Dave

[Fester]

I run 265/40/17 Goodyear F1s on 9x17 rims on my R32, if that's any help.

[RonS]

As DaveW says, on R32 GTR 8J rims 225/50-16 are standard

Toyo have a useful info page on sizes for any given rim widthHERE

RonS

[JasonO]

Lee,
I think we are all missing the obvious answer for you

Fit the same width and profile front and back.

Fit 245x45x17 all round on the 17" rims and you'll be fine, assuming that your 17" rims are all the same width.

[Mycroft]

Right, just so you are really confused you must also look at the tyre load rating, it should be uprated to allow for the lower sidewall height, you can see this exemplified in the last figures shown i.e. 88V/92V(?).
For 17" wheels you must uprate the side wall strength otherwise the car will be a bit wauward under braking, the 'number and reference' are important, so 245/45×17 92Y is the minimum, a 94W would suffice but it would be a lesser tyre, going upto a 96Y (if you can find one will put you in a good position to do trackdays with impunity.

Edit...rim width, if you go for 8" that will be a minimum for 245s' better will be 8½" as that will give a more alert feel due to the more 'vertical' sidewall profile.

[wrx.co.uk]

Brilliant, thanks for all the help guys.

I would like to point out that although this is our first skyline we have been working with WRX's / EVO's for quite a while now so give us a bit of credit eh.

Yes the obvious answer is to fit the same alround, no need to shout that one out. The question is that I have spoken to some traders and exporters in Japan and they often see GTR's both 32's and 33's with larger rears fitted, perhaps the Japanese are ahead of us LOL.

On any permanent 4wd car the over diameter of the wheel must be the same:-

225/50/16" rims (standard) = 631mm
235/45/17" rims (my fronts) = 643mm (1.9% variance)
255/40/17" rims (my rears) = 636mm (0.7% variance)

Not enough there to worry me.

SO the fronts are a fairly good match for the originals.
The question I am asking is if the wider rears are better than orginals.

From a standing start I would say yes, but cornering is more complex. The lateral Gee sensor would come in to play before the rears break free, making the car less volitile. After all the more advanced R33 system works much quicker. But would this induce more understeer?

Now I could fit fatter fronts, expensive and less comfotable around our roads.

Comments please.

ps Emre great comments m8 thanks. I Should have worked that out really.

[Billysan]

Im running 255/40/17's on 10by17's on all four corners if that helps!

Bill