What Tyres?

[t5iv]

OK. So many misnomers here -

1) Running 245s all round on different width wheels isn't actually a square set up. Reason is that there is more stretch when the tyre is put on a wider wheel. When GT-R owners say square, they mean 9,9.5,10 inch wheels all around.

2) KU31s are a perfectly good tyre for the power that these cars produce. Used them for a year on everything from street to track to runs with a bit of pace on very twisty private roads... The reason that club members preferred the KU31 over KU36 was they provide marginally less grip but they get heap into them very quickly.

3) You can fit some seriously wide wheels on these cars - especially coupes. FYI, I'm running 19x9 (f) 245/40/19 and 19x9.5 ® 265/40/19. Fills guards well. Needed a touch of rolling on the rear.

4) All modern Nissans run 5x114.3 PCD - c'mon! Unless it's a 6 stud navara or a 4 stud Pulsar. Even 4 stud Nissans are 4x114.3

5) Run the same rim diameter all around. It looks stupid otherwise.

6) Good tyre brands - Nitto, Michellin, Pirelli, Kuhmo, Hankook. Hankook RS-3s are the rage at present with guys who drive their cars hard. 595 RSRs have mixed reviews. I know a lot of guys who ran them and when we had a track day in the rain it was worse than rollerskates on marbles. Then again, Noel runs them on the Chair and he loves them. Don't think the chair sees the wet though.

7) http://www.willtheyfit.com/ Good site. Gives you a good visual idea as to what works.

8) Don't lower your car to the point where the rails are dragging and the wheels are more horizontal than vertical. This is counter-intuitive to any semblance of common sense.

9) Lightweight forged, good brand name wheels are worth their weight. Even if it isn't brand name, look for build quality reviews etc.

10) If you're in QLD, Dan at Bosman Tyres is good and offers a great range. Good bloke as well. Had a track evo so knows how to dial in the right settings for best performance. Ask one of the current serving Execs for more.

Andrew, #Nightcrawler, runs a pretty neat set up. think they're 19s as well.

[INSANITI]

Hi PaulReeves,

nope they don't rub (front or back). the wheels tyre size are just right for the coupe (I have a 2005 AT coupe base model I think).

I didn't do a staggered setup as the car itself its costly to maintain (rego, comprehensive insurance, petrol, personalised plates lolz) so I figured 19s all round is good.

I wont recommend 18s because even at 19 inch I still have a lot of fender clearance (gap). I don't have lowered suspensions. they are all stock except for catback exhaust xforce and KN filter and some performance increasing stickers.

I think the coupe are made for 20's and I've seen a few on 20's and slightly lowered looks 6c!

I got mine through bobjane and have kumho le sport KU39's. also I find that I have to rotate/realign my tyres every 6-7k kms.

wont recommend semi slicks if its a daily drive.

goodluck!

apologies for late reply. "Daddy's gotta go to work"

[t5iv]

I wont recommend 18s because even at 19 inch I still have a lot of fender clearance (gap). I don't have lowered suspensions. they are all stock except for catback exhaust xforce and KN filter and some performance increasing stickers.

I think the coupe are made for 20's and I've seen a few on 20's and slightly lowered looks 6c!

"Daddy's gotta go to work"

You can't change the rolling diameter too much. So, larger rim diameter, smaller tyre profile.If you want to reduce fender clearance, lowering is the way to go.

If anyone is interested, the way to calculate rim diameter is:

rim size x 25.4 to get size in mm

18" - 457.2mm

19" - 482.6mm

Tyre profile for the amount of tyre on either side of the wheel is wheel with multiplied by aspect ratio

265/40 ie 265 x 0.4 = 106mm So that means that you have 106mm of sidewall on each side of the wheel. Multiply this by 2 (for both sides of the wheel) and add to the rim diameter.

If your rolling diameter is out by more than a couple of % (think 3% IIRC) your speedo will be out and VDC will lose the plot.

Does that help?

To your second part JT, I share this sentiment

[INSANITI]

You can't change the rolling diameter too much. So, larger rim diameter, smaller tyre profile.If you want to reduce fender clearance, lowering is the way to go.

If anyone is interested, the way to calculate rim diameter is:

rim size x 25.4 to get size in mm

18" - 457.2mm

19" - 482.6mm

Tyre profile for the amount of tyre on either side of the wheel is wheel with multiplied by aspect ratio

265/40 ie 265 x 0.4 = 106mm So that means that you have 106mm of sidewall on each side of the wheel. Multiply this by 2 (for both sides of the wheel) and add to the rim diameter.

If your rolling diameter is out by more than a couple of % (think 3% IIRC) your speedo will be out and VDC will lose the plot.

Does that help?

To your second part JT, I share this sentiment

hahaha my mates uses this quote when we go out for a drive "time to unleash the beast" lolz

I thought the rock's "daddy's gotta go to work (while breaking his cast using by flexing) was the best of the movie lolz

[PaulReeves.com - GPOWER.TV]

Went to Tempe Tyres yesterday & asked the main dude how big I could go & be legal roadworthy on my 350GT Sedan without rubbing insides of the tyres & he just said "the only legal street tyre you'd have is what you have on now"! (Which is stock 215/55R17's.

I could give you 20's if you wanted to.

Hooray, that was great knowledge to give me, ahah.

So they were a waste of info to gather up on a setup!!! Lol

So I just got sum cheap ass pacies to pass SA Workshop next week.

Back to the drawing board & asking/reading your responses guys...

I'll simply ask.

***Any Sedan GT owners running 20's or 19's on theirs, come forward PLEASE!!!

[The Max]

OK. So many misnomers here -

2) KU31s are a perfectly good tyre for the power that these cars produce. Used them for a year on everything from street to track to runs with a bit of pace on very twisty private roads... The reason that club members preferred the KU31 over KU36 was they provide marginally less grip but they get heap into them very quickly.

And in my opinion, you just mentioned a misnomer right there, the misnomer being "perfectly good". I've thrown my V36 around a fair bit and I can safely say that the KU31 tyres are absolutely lacking in grip. So often did my traction control trigger turning corners where even my crappy boat of a BA wagon wouldn't break traction (with Pilot Sport 3 tyres too). Even a near 90 degree bend at 50km/h has me screeching whereas my Pilot Sport 3 set up maintains excellent grip.

While you have obviously had better luck with them, my experiences prevent me from having anything positive to say about them for the spirited driver. It was the first time I've ever used any Kumho tyre and it was on the recommendation of my compliance guy three years ago. Never again.

As for all your other points, except for #10 since I'm not from Queensland, I agree!

Edited April 10, 2015 by The Max

[t5iv]

And in my opinion, you just mentioned a misnomer right there, the misnomer being "perfectly good". I've thrown my V36 around a fair bit and I can safely say that the KU31 tyres are absolutely lacking in grip. So often did my traction control trigger turning corners where even my crappy boat of a BA wagon wouldn't break traction (with Pilot Sport 3 tyres too). Even a near 90 degree bend at 50km/h has me screeching whereas my Pilot Sport 3 set up maintains excellent grip.

While you have obviously had better luck with them, my experiences prevent me from having anything positive to say about them for the spirited driver. It was the first time I've ever used any Kumho tyre and it was on the recommendation of my compliance guy three years ago. Never again.

As for all your other points, except for #10 since I'm not from Queensland, I agree!

That's strange. I know guys with 200-300kw who haven't had issues. Could be a number of other things. Either way, they aren't made any more so meh.

Lol. Thanks!

[t5iv]

Went to Tempe Tyres yesterday & asked the main dude how big I could go & be legal roadworthy on my 350GT Sedan without rubbing insides of the tyres & he just said "the only legal street tyre you'd have is what you have on now"! (Which is stock 215/55R17's.

I could give you 20's if you wanted to.

Hooray, that was great knowledge to give me, ahah.

So they were a waste of info to gather up on a setup!!! Lol

So I just got sum cheap ass pacies to pass SA Workshop next week.

Back to the drawing board & asking/reading your responses guys...

I'll simply ask.

***Any Sedan GT owners running 20's or 19's on theirs, come forward PLEASE!!!

I'm running 19s. Specs were posted up there somewhere. Got some rubbing on the front and spacers should fix that. Need to work out if wheel studs are going to be long enough or need to go extended.

Keep your rolling diameter within 3% and you will be fine. Mine are 245/35/19 and 265/30/19. Runs fine.