Offset help?

2013Zsport

I'm looking to buy forgestar f14s and don't want a too aggressive fitment. I would like to get 20x9 or 20x9.5 front and 20x11 R with a 255/35/20f and 285/30/20r. So far I'm going to keep the stock height suspension and camber. I want offsets that are close without rubbing and not quite flush, what offsets should I go with? Please help!

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

2013Zsport

I've used all of these before just wondering how accurate this calculator is?

2013Zsport

I was thinking +30f and +28r

2013Zsport

Getyourwheels said +20f +15r which is flush but is to aggressive for what I want.

cooltoy

Those will stick slightly past (2-5 mm). The rear wil look better as it wil stick out less. You might have to stretch the tires a bit.

cooltoy

I think its accurate. Just measure your stock rims and how far they are from the edge of the fender (~20 mm I think) and then use the calculator to give you the offset that gets you close to the rim.

Haboob

Thanks for this.

Now if I can figure out how to decipher it. So many numbers.

cooltoy

+30 front will be sunken in a bit (3 mm), but you can use a slightly wider tire to to get it more flush.

The + 28 rear will be slightly more sunk in then the front (8mm), so a small spacer might be needed.

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.

2013Zsport

According to the rimsNtires.com offset calculator I can do a 20x9 +33F with a 245/35/20 and a 20x11 +20 R with a 285/30/20. Front will extend 14mm and rear will extend 15mm. But the Nissansportz.com offset calculator says the front will extend 14mm the same as the rims and tires offset caculator but the rear says it will extend 23mm, so 8mm more than the other calculator did, doesn't make sense!

cooltoy

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

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.

cooltoy

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.

cooltoy

Tires you are looking at are pretty wide for a conservative set up. They wil definitely stick out a touch even with your desired offsets.