Different Size Tires

Zis4me · 03-22-2013, 10:49 AM

Maybe I'll just get the Potenza RE760 Sport on all four sides.

chrischhorn · 03-22-2013, 02:59 PM

Currently I have re970's in front at a 255/45/18 and Re760's in the rear at 275/40 and I honestly don't feel a difference. At the moment until I upgrade to RE-11's, I'm even auto crossing on the set. People are always amazed that I'm running all seasons on front for autocross but they actually handle pretty damn well. Of course I'm still a beginner so as my skills get better, obviously my opinion of the tires will change. The big difference always tends to be when people mix manufacturers and not just different tread patterns. Each company generally builds all their tires with same speed rating the same so staying same company doesn't make the car feel loose. Running a bridge stone w rated tire with a dunlop w rated tire and sidewalls are constructed differently then the car will probably feel unsteady.

Zis4me · 03-22-2013, 03:13 PM

Quote:

Originally Posted by chrischhorn

Currently I have re970's in front at a 255/45/18 and Re760's in the rear at 275/40 .

you are running on the stock rims?

chrischhorn · 03-22-2013, 09:21 PM

Quote:

Originally Posted by Zis4me

you are running on the stock rims?

I ran them for a month or so with those sizes before I bought my new wheels since I was basically pre planning the new wheels.

Zis4me · 03-22-2013, 11:26 PM

So I could run 235/45 and 255/40 with no problem what if i wanted to jump up to 235/45(front)F 275/40(rear) in the rear.. would that be an issue?

chrischhorn · 03-22-2013, 11:38 PM

Quote:

Originally Posted by Zis4me

So I could run 235/45 and 255/40 with no problem what if i wanted to jump up to 235/45(front)F 275/40(rear) in the rear.. would that be an issue?

a 245/45 on front and a 275/40 on the rear would be fine. 235/45 is still too small to OEM diameters. 275/40 is almost a direct match for OEM diameters and so is 255/45 which are the reasons I chose these sizes. My next set will be a 275/35 and a 255/40. Smaller diameter so "shorter gearing" for autocross or maybe just a 275/35 square setup.

Zis4me · 03-23-2013, 12:46 AM

235/45 and 255/40 is not good either?

chrischhorn · 03-23-2013, 01:01 AM

Quote:

Originally Posted by Zis4me

235/45 and 255/40 is not good either?

Technically yes it will work together but not individually......dunno why you have to make it so complicated..

Waiz · 03-23-2013, 10:33 AM

Use this tire size calculator:

Tire Size Calculator - Compare Tire Sizes

Using your current specs your front tire is taller than your rear tire, this is a disastrous setup.

You want to maintain around a 3% difference to keep all TCS, VDC happy with your rear tires always being larger

I would go with 225-40-18 front and keep your rears as is

Zis4me · 03-23-2013, 03:54 PM

Quote:

Originally Posted by Waizzz

Use this tire size calculator:

Tire Size Calculator - Compare Tire Sizes

Using your current specs your front tire is taller than your rear tire, this is a disastrous setup.

You want to maintain around a 3% difference to keep all TCS, VDC happy with your rear tires always being larger

I would go with 225-40-18 front and keep your rears as is

you think I should run 40's all around.. that wont cause an issue?

chrischhorn · 03-23-2013, 08:06 PM

Quote:

Originally Posted by Zis4me

you think I should run 40's all around.. that wont cause an issue?

VDC/ABS/TC won't have issues but your going to be going smaller sidewalls and I can almost guarantee that your tires dont meet the recommeneded vehicle load rating. Load rating is what the manufacturer decides what is needed to properly and safely support the vehicle. A lot of people to careless but I tend to bother them with it anyways. I drive my vehicle aggressively and make sure that the tires can withstand what I or the road throws at em.

Waiz · 03-23-2013, 08:13 PM

Quote:

Originally Posted by Zis4me

you think I should run 40's all around.. that wont cause an issue?

Of course not, as long as you maintain enough stagger

Just use the sizing I gave you, it's not that difficult

Zis4me · 03-23-2013, 03:52 PM

i'm just gonna run stock then
til i buy rims next year

03-22-2013, 02:59 PM	#2 (permalink)
chrischhorn A True Z Fanatic Join Date: Jan 2012 Location: Mililani, HI Posts: 1,566 Drives: 2014 Juke Nismo RS Rep Power: 18	Currently I have re970's in front at a 255/45/18 and Re760's in the rear at 275/40 and I honestly don't feel a difference. At the moment until I upgrade to RE-11's, I'm even auto crossing on the set. People are always amazed that I'm running all seasons on front for autocross but they actually handle pretty damn well. Of course I'm still a beginner so as my skills get better, obviously my opinion of the tires will change. The big difference always tends to be when people mix manufacturers and not just different tread patterns. Each company generally builds all their tires with same speed rating the same so staying same company doesn't make the car feel loose. Running a bridge stone w rated tire with a dunlop w rated tire and sidewalls are constructed differently then the car will probably feel unsteady. __________________ R.I.P. 8/01/13 1SlowZ One day I'll have another.... Last edited by chrischhorn; 03-22-2013 at 03:02 PM.

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03-22-2013, 10:49 AM	#1 (permalink)
Zis4me Base Member Join Date: Feb 2013 Location: South Florida Posts: 25 Drives: 09 370Z Rep Power: 14	Maybe I'll just get the Potenza RE760 Sport on all four sides.

03-22-2013, 11:26 PM	#5 (permalink)
Zis4me Base Member Join Date: Feb 2013 Location: South Florida Posts: 25 Drives: 09 370Z Rep Power: 14	So I could run 235/45 and 255/40 with no problem what if i wanted to jump up to 235/45(front)F 275/40(rear) in the rear.. would that be an issue?

03-23-2013, 12:46 AM	#7 (permalink)
Zis4me Base Member Join Date: Feb 2013 Location: South Florida Posts: 25 Drives: 09 370Z Rep Power: 14	235/45 and 255/40 is not good either?

03-23-2013, 10:33 AM	#9 (permalink)
Waiz A True Z Fanatic Join Date: Apr 2010 Location: SoCal Posts: 9,262 Drives: Z33 & GE8 Rep Power: 461	Use this tire size calculator: Tire Size Calculator - Compare Tire Sizes Using your current specs your front tire is taller than your rear tire, this is a disastrous setup. You want to maintain around a 3% difference to keep all TCS, VDC happy with your rear tires always being larger I would go with 225-40-18 front and keep your rears as is

03-23-2013, 03:52 PM	#13 (permalink)
Zis4me Base Member Join Date: Feb 2013 Location: South Florida Posts: 25 Drives: 09 370Z Rep Power: 14	i'm just gonna run stock then til i buy rims next year