Offset help?

cooltoy · 02-23-2014, 07:23 PM

Quote:

Originally Posted by 2013Zsport

So maybe +23 or +24? The front sounds good! And I think +30 is the highest I can go without hitting the brake calipers.

I can't recall the stock rim sizes. I have them at work. I'll check for you tomorrow.

2013Zsport · 02-24-2014, 03:14 AM

Quote:

Originally Posted by cooltoy

Hmmm. That's different from what I measured on pre 2013 models, maybe they changed something on the front. Didi you lay a thin flat object across the diameter of the wheel and measured from that?

Yes, I used a level. That's the only thing I can think of is that maybe Nissan changed the offsets on the 13s wheels.

2013Zsport · 02-24-2014, 03:23 AM

Quote:

Originally Posted by cooltoy

I can't recall the stock rim sizes. I have them at work. I'll check for you tomorrow.

Thanks! I think the sport wheels are 19x9f +47 245/40/19 & 19x10r +30 275/35/19 at least 09-12 my13tires are the same maybe the offsets are different, I'll see if I can find anything on that.

Haboob · 02-24-2014, 08:13 AM

Quote:

Originally Posted by cooltoy

Talk to getyourwheels. They will set you up.

http://www.the370z.com/wheels-tires/...p-concave.html

Use this to calculate offsets.

Custom rims, wheel tire packages for your ride - RIMSnTIRES.com

This is a good read.

Wheel specs without having to use spacers

Thanks for this.

Now if I can figure out how to decipher it.

So many numbers.

cooltoy · 02-24-2014, 10:14 AM

Quote:

Originally Posted by 2013Zsport

Thanks! I think the sport wheels are 19x9f +47 245/40/19 & 19x10r +30 275/35/19 at least 09-12 my13tires are the same maybe the offsets are different, I'll see if I can find anything on that.

Same numbers I have seen. Like I said - not sure about 2013-14.

Anyway here as some numbers with different tire options and offsets. I ran your desired offsets and getyuorwheels recommendations. The difference in tire numbers is obviously by how much the tire sticks out past the lip.

Fronts:

255/35/20x9 +30
Will stick out 22 mm farther then stock.
Wheel diameter 686 mm (679 mm stock)
245/35/20x9 +30
Will stick out 17 mm farther then stock.
Wheel diameter 680 mm (679 mm stock)

255/35/20x9 +20
Will stick out 32 mm farther then stock.
Wheel diameter 686 mm (679 mm stock)
245/35/20x9 +20
Will stick out 27 mm farther then stock.
Wheel diameter 680 mm (679 mm stock)

Rear:

285/30/20x11 +28
Will stick out 7 mm farther then stock.
Wheel diameter 680 mm (675 mm stock)
295/30/20x11 +28
Will stick out 12 mm farther then stock.
Wheel diameter 686 mm (679 mm stock)
305/30/20x11 +28
Will stick out 17 mm farther then stock.
Wheel diameter 692 mm (679 mm stock)

285/30/20x11 +15
Will stick out 20 mm farther then stock.
Wheel diameter 680 mm (675 mm stock)
295/30/20x11 +15
Will stick out 25 mm farther then stock.
Wheel diameter 686 mm (675 mm stock)
305/30/20x11 +15
Will stick out 30 mm farther then stock.
Wheel diameter 692 mm (675 mm stock)

285/30/20x11 +23
Will stick out 12 mm farther then stock.
Wheel diameter 680 mm (675 mm stock)
295/30/20x11 +23
Will stick out 17 mm farther then stock.
Wheel diameter 686 mm (675 mm stock)
305/30/20x11 +23
Will stick out 22 mm farther then stock.
Wheel diameter 692 mm (675 mm stock)

Hope this helps.

2013Zsport · 02-24-2014, 03:20 PM

it does help thanks! i just got off the phone with Forgestar and they recommended 20x9.5F +25 with a 255/35/20 and a 20x11R +20 with a 295 or 305 tire. I'm still going with a 285 though

cooltoy · 02-24-2014, 03:36 PM

Let us know how it works out.

2013Zsport · 02-24-2014, 06:11 PM

I will! Thanks again for your help!

Waiz · 02-24-2014, 06:31 PM

Make sure you don't go 35 series front and 30 series rear that will lead to this since the front tires overall diameter will be larger than the rear

BRAKE, ABS, VDC OFF, SLIP light on.What do I do?

I would go 20x9.5 (+20) with 255-30-20 front and 20x10.5 (+15) with 285-30-20 rear if I was choosing this wheel

cooltoy · 02-24-2014, 08:13 PM

Not questioning just trying to learn.

How come the stock wheels are 40 in the front and 35 in the back? Those are different, should they not cause a similar issue?

Is it because you want to keep the rear and front diameters similar? Aren't the numbers I ran within reasonable limit?

Waiz · 02-25-2014, 03:47 PM

Quote:

Originally Posted by cooltoy

Not questioning just trying to learn.

How come the stock wheels are 40 in the front and 35 in the back? Those are different, should they not cause a similar issue?

Is it because you want to keep the rear and front diameters similar? Aren't the numbers I ran within reasonable limit?

All depends on the sizing, VDC is generally happy if you can maintain stagger with the fronts being less than 1% greater than the rears

The stock setup of 245-40-19 and 275-35-19 rear is .5% larger in the front which will not be detected by the VDC/TCS

255-35-20 & 285-30-20 is 1.1% larger in front which could possibly risk the VDC/TCS going off with

Best way to be safe is to use a tire size calculator:

Tire size calculator

Reference:

Will these tires work with my VDC enabled car??? Read HERE! - MY350Z.COM Forums

cooltoy · 02-25-2014, 07:51 PM

Thank you.

02-24-2014, 08:13 PM	#25 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,948 Drives: 14 PW 370Z S/T MT Rep Power: 240365	Not questioning just trying to learn. How come the stock wheels are 40 in the front and 35 in the back? Those are different, should they not cause a similar issue? Is it because you want to keep the rear and front diameters similar? Aren't the numbers I ran within reasonable limit? Last edited by cooltoy; 02-24-2014 at 08:45 PM.

02-25-2014, 07:51 PM	#27 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,948 Drives: 14 PW 370Z S/T MT Rep Power: 240365	Thank you. Waiz likes this.

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02-24-2014, 03:20 PM	#21 (permalink)
2013Zsport Base Member Join Date: Oct 2012 Location: Queensbury NY Posts: 58 Drives: 2013 370z sports pkg Rep Power: 12	it does help thanks! i just got off the phone with Forgestar and they recommended 20x9.5F +25 with a 255/35/20 and a 20x11R +20 with a 295 or 305 tire. I'm still going with a 285 though

02-24-2014, 03:36 PM	#22 (permalink)
cooltoy Elite Member Join Date: Jun 2012 Location: Calgary Posts: 13,948 Drives: 14 PW 370Z S/T MT Rep Power: 240365	Let us know how it works out.

02-24-2014, 06:11 PM	#23 (permalink)
2013Zsport Base Member Join Date: Oct 2012 Location: Queensbury NY Posts: 58 Drives: 2013 370z sports pkg Rep Power: 12	I will! Thanks again for your help!

02-24-2014, 06:31 PM	#24 (permalink)
Waiz A True Z Fanatic Join Date: Apr 2010 Location: SoCal Posts: 9,262 Drives: Z33 & GE8 Rep Power: 459	Make sure you don't go 35 series front and 30 series rear that will lead to this since the front tires overall diameter will be larger than the rear BRAKE, ABS, VDC OFF, SLIP light on.What do I do? I would go 20x9.5 (+20) with 255-30-20 front and 20x10.5 (+15) with 285-30-20 rear if I was choosing this wheel