20'' Wheel & Tire Discussion Thread
The offset moves the wheel toward, or away, from the fender.
The width of the wheel ALSO moves the edges of the wheel and, from what you can see in the average picture, does the same thing as offset.
So a skinny 20 inch wheel with a 15 offset could look "sunk" where a wider wheel with a less agressive offset could look closer to "flush".
Where the outer edge of a wheel sits in relation to the fender depends on offset AND width. (And to some degree, diameter)
So a wide 30 offset wheel can look just like a skinny 15 offset with respect to how it "fills the fender."
The width of the wheel ALSO moves the edges of the wheel and, from what you can see in the average picture, does the same thing as offset.
So a skinny 20 inch wheel with a 15 offset could look "sunk" where a wider wheel with a less agressive offset could look closer to "flush".
Where the outer edge of a wheel sits in relation to the fender depends on offset AND width. (And to some degree, diameter)
So a wide 30 offset wheel can look just like a skinny 15 offset with respect to how it "fills the fender."
But basically offset is the distance in MM that the hub sits from the center of the wheel.
With a 10" wheel offsets around +20 to +25 will look good but if you have a 7" wide wheel then you'd need an offset around -15 to have it look "fender flush"
So when you say "what are you talking about".. That's what I'm talking about. Width and offset work in correlation with each other. People not understanding this is why you see car with poke (wheels sticking way out of the fender) or cars with sunk in wheels.
Thanks, tires are 245/35 and 275/30's. With the brand tires I chose I probably should have gone 285's in the rear because the rear tire is stretched more than the front but I'm really the only one who notices. I believe the offsets are +15 F and +20 rear and the front is now 5mm lower than the pic shows which is now perfect.This wasn't a package deal I bought, I got everything separate because I get good prices on tires, the wheels I bought retail and I installed everything myself (don't really trust anyone else).
Last edited by InfinitiWPB; Jan 16, 2016 at 05:30 AM.
Yes the wrong size front tire. 245/35-20 is an inch taller than the stock size front tire. It's is also slightly taller than the rear, typically our cars like having a taller rear tire compared to the front for ABS/TCS and VDC reasons. 245/30-20 would be the proper front tire.
Btw, the fender to bumper mount area will cut your tire up do to the extra height.
Btw, the fender to bumper mount area will cut your tire up do to the extra height.
Yes the wrong size front tire. 245/35-20 is an inch taller than the stock size front tire. It's is also slightly taller than the rear, typically our cars like having a taller rear tire compared to the front for ABS/TCS and VDC reasons. 245/30-20 would be the proper front tire.
Btw, the fender to bumper mount area will cut your tire up do to the extra height.
Btw, the fender to bumper mount area will cut your tire up do to the extra height.
this was the car that moved me to get my VSXX
looks amazing
Front rim size
20x9.5
Front rim offset
+8
Front tire size
P 245/30 R20
Wheel backspacing (testing)
5.56”
Rear rim size
20x11.0
Rear rim offset
+4
Rear tire size
P 285/30 R20
Wheel backspacing
6.16”
Rims brand
Work Wheels VS-XX
No spacers
- Fender inner lips cut, sanded down, and seams sealed
- Front camber -2.5 degrees, rear camber -3.0 degrees
- Cusco front camber arms
- SPC rear camber arms
- Stance coilovers
- No big brake
looks amazing
Front rim size
20x9.5
Front rim offset
+8
Front tire size
P 245/30 R20
Wheel backspacing (testing)
5.56”
Rear rim size
20x11.0
Rear rim offset
+4
Rear tire size
P 285/30 R20
Wheel backspacing
6.16”
Rims brand
Work Wheels VS-XX
No spacers
- Fender inner lips cut, sanded down, and seams sealed
- Front camber -2.5 degrees, rear camber -3.0 degrees
- Cusco front camber arms
- SPC rear camber arms
- Stance coilovers
- No big brake
Last edited by jdmfetish; Jun 27, 2016 at 09:00 AM.
I saw a 370z online with rohana rf2 gloss red. Fitment: 20×11 et25 front and 20×12 et25 rear.
Seems too wide to fit under a 350z but I like how concave the fronts are. Anyone running theses or similar offsets and sizes?
I tried to contact rohana but haven't heard back. I thought perhaps I could run 20×10 et25 fronts and 20×11 et25 rear.
Of course I'd roll the fenders but I don't want to camber the heck out of the car.
Thoughts, opinions, pics???
Seems too wide to fit under a 350z but I like how concave the fronts are. Anyone running theses or similar offsets and sizes?
I tried to contact rohana but haven't heard back. I thought perhaps I could run 20×10 et25 fronts and 20×11 et25 rear.
Of course I'd roll the fenders but I don't want to camber the heck out of the car.
Thoughts, opinions, pics???
Looking at some 2013 GTR wheels with almost new tires on them. I've done a lot of research on this and found some people running GTR wheels but can't find what tire sizes people are running on them. I think the rear will be fine, but I'm worried about the 285 tire on the front. Any input you guys can give would be appreciated. I have a 2008 base, stock suspension. Details of potential setup below...
FRONT
Wheel - 20x9.5+45
Tire - 285/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
REAR:
Wheel - 20x9.5+45
Tire - 295/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
If trying to make this work is ridiculous, please say so lol. If I have to change the tires, it is no longer worth buying these wheels...
FRONT
Wheel - 20x9.5+45
Tire - 285/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
REAR:
Wheel - 20x9.5+45
Tire - 295/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
If trying to make this work is ridiculous, please say so lol. If I have to change the tires, it is no longer worth buying these wheels...
350Z/370Z Tech Moderator
MY350Z.COM
MY350Z.COM



Joined: Oct 2014
Posts: 10,313
Likes: 3,378
From: Northern California
Looking at some 2013 GTR wheels with almost new tires on them. I've done a lot of research on this and found some people running GTR wheels but can't find what tire sizes people are running on them. I think the rear will be fine, but I'm worried about the 285 tire on the front. Any input you guys can give would be appreciated. I have a 2008 base, stock suspension. Details of potential setup below...
FRONT
Wheel - 20x9.5+45
Tire - 285/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
REAR:
Wheel - 20x9.5+45
Tire - 295/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
If trying to make this work is ridiculous, please say so lol. If I have to change the tires, it is no longer worth buying these wheels...
FRONT
Wheel - 20x9.5+45
Tire - 285/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
REAR:
Wheel - 20x9.5+45
Tire - 295/35/20
Comparison to stock: http://www.willtheyfit.com/index.php...9-5&offset2=45
If trying to make this work is ridiculous, please say so lol. If I have to change the tires, it is no longer worth buying these wheels...
225 45% 18 25.97 Stock Reference Size
245 45% 18 26.68 Stock Reference Size
235 30% 20 25.55
245 30% 20 25.79 Alt FRONT
255 30% 20 26.02 FRONT
265 30% 20 26.26
275 30% 20 26.50 Alt REAR
285 30% 20 26.73
295 30% 20 26.97
Wheel fit requires 20 or 25mm wheel spacers for optimum fit and may require rear fender roll if you run 285s.






