Tyre advice

[Lex300]

Hi guys need some advice been trying the tyre calculators and still none the wiser. Wheels are 18x9.5 et20 all round and after some tyres that will keep the car happy with tcs and anything else. Would i be fine having all the same tyres all round or best stagard. The tyres i came up with on the calculator.  Not sure if right. Was 255x40x18 or 265x40x18 all round or would a 265x40 rear and 255x40 front be fine with the tcs etc systems . The car is lowered on tein springs 17mm front 14mm rear . If you guys can let me know will be most appreciated.  So i can get some tyres thank you.

[Ekona]

Don’t put the same size tyres all round, it’ll become very oversteery. Carry on playing with the calculator, try and keep within 3% difference of stock settings with 20-40mm difference in width front to rear. 

 

I’ll have a go later when I’m near the pc for you. 

[Lex300]

Ive had another go 

Stock front 225x45x18 

Option tyre front 245x40x18 = -1% difference

might be stretched with a 9.5 wide

Stock rear 245x45x18

Option tyre 265x40x18 = -1.27% difference 

The 245 might be a stretch on the 9.5 would sooner have them level with the wheel.

 

2nd size

Stock front 225x45x18

Option tyre 255x40x18 = 0.23% difference 

Stock rear  245x45x18

Option tyre 275x40x18 = -0.07% difference 

Im not sure if the 275 will stick past the rim and hit the stock rear arch on a 9.5 et20

 

Whats do you guys think.

 

[Ekona]

2nd looks better to me, and I reckon you’ll be fine with regards to touching the arches since that’s a very common rear width for Zeds, albeit usually on 19s. 

[Ben–350Z]

Ah, looks like you've just come up with what I replied to your PM with

 

I think you'll be fine on the rear arches - mine only just caught, and at an et12 sit 8mm further out than your et20 would.

 

FWIW, I didn't find rolling the arches too much of a problem.

[350Butcher]

Different manufacturers measure up differently which makes this sometimes harder to work out but I have 255/40 front and 265/40 rear Yokohama AD08R tyres on 18" wheels and there is no issue with the tc at all

[StevoD]

For reference I ran the following 

 

255/40/18

18x9.5 et15

 

275/40/18

18x10.5 et15

 

Best handling set up I have ran for spirited driving 

 

I have also ran 

245/40/18

18x9 et3 

 

265/40/18

18x10 et3

 

I'm think I'd be righting in saying I probably have run the most amount of combos on this forum on a Z feel free to send a pm over 

Edited June 25, 2018 by StevoD