nizmo_0385

iTrader: (5)

The pic shows stance not beef.
Beefy tires would require 275 35 front and 305 30 rear.

Jasper_wash

Well I definitely don't mean beefy.

dboyzalter

iTrader: (3)

Q: What wheel sizes and offsets do I need?
A: Generally speaking, there are a LOT of different combinations that people are running on their Z or G.

Let's get the basics out of the way first: You need a lug pattern of 5x114.3, width between 8 and 11 inches, and diameter of 17", 18", 19", or 20".

Here are some of the more popular wheel and tire sizes (for good reason) that people put on their Z's. There is no "RIGHT" answer but there is a limit to how big or small you can go.

18" combination:
Front 18" x 8.5" , Offset +15 to +25, Tires 245/40/18
Rear 18" x 9.5" , Offset +15 to +25, Tires 275/40/18
(lower offset such as +10 in rear is possible but may require rolling)

Front 18" x 9.5" , Offset +25 to +30, Tires 255/40/18
Rear 18" x 10.5" , Offset +28 to +35, Tires 285/40/18 or 295/35/18
(lower offset such as +23 in the rear is possible but may require rolling)

terrasmak

iTrader: (8)

Do you want properly fitting tires or stretch ?

What offset are the wheels you are getting ?

Jasper_wash

Thanks. There are definitely a lot of combinations to choose from... I'm just trying to see what's the ideal range. I have a +22 offset. Do you think with it being lowered 1.5 inches it'll need a fender roll?

Jasper_wash

I'm thinking proper fitting as of now. But the offset is +22

SPM350Z

iTrader: (1)

Ok...just found out I'm getting a bonus in a few months and I've decided to get my Z new wheels. I have spent the last month looking at every page of multiple threads in the wheels/tire area...from this thread to the Unofficial Enkei Wheels Thread to the Nismo Wheels Thread to the PSA: When asking "will this rub"... and most recently BACK TO BASICS: WHEEL OFFSET. Before I ask my question I want give props to members Waiz, Terrasmak, and Spike100 who've literally been answering these questions for 9+ years...that's a lot of time and knowledge dropped and I think they deserve a big thank you. More recently MicVelo has been getting crazy detailed with his information on wheels and suspension so many thanks to him as well.

Ok...I have a base 2005 350z with stock everything including wheels and tires. I have decided I want to get the 18 inch Enkei Tuning Kojin wheels in silver. Originally was going to go 9.5 all around(like member GPD recently got and looks awesome) but I really like the look of the standard rim in front and concave in back. So for the back 9.5(15mm offset) i'm going with a 275 40. My question is for the front 8.5 wheel(25mm offset)..not sure if I should do 245 40 or 255 40? Does it make that much difference in anything? I don't plan on dropping it and want to avoid rubbing if I can...I'll roll the rear fender if necessary but don't want to mess with front fender screw if I don't have to. Would like it as flush as possible without using spacers if I can help it. I use it as a mostly daily driver...spirited but not a canyon carver very often...mostly highway miles. And if it helps the tire I plan on getting is the Continental Extreme Contact DWS 06. Thanks in advance for any guidance.

Shawn

Dekker001

I think I'll just post my specifics also.

Stock suspension, daily driver, I will have the fenders rolled, but don't want any rubbing.

Looking to bring the wheels out as close to flush as possible without spacers/camber/rubbing.

I want to go with either the RPF1 or Varrstoen ES3. (Other brands are fine, as long as lightweight and good quality)

I have the money to buy nice wheels, just can't get my head wrapped around the math, and the local tire shops are.....well ...you know....

I would like to go 10.5 in rear, 9.5 in front

Varrstoen http://varrstoen.com/products/es-3/

Enkie http://enkei.com/wp-content/uploads/2015/07/RPF1.pdf

dboyzalter

iTrader: (3)

Shawn if your dead set on getting the staggered wheels it shouldn't make a huge difference between 245/40 or 255/40...

However given the fact that you have a base z and dont need to worry about traction control issues I would consider the 9.5 +15 square the better option for the added offset and would seriously consider runing square set-up all around.. Or the 245 or 255/275 would work fine also.

If the front was available with the same offset as the 9.5 that would be ideal but you might want a 10mm spacer once you get them and that would suck considering your ordering wheels specifically for your car.

turboed350z

245 for cheaper. 255 for looks. Honestly they will be the sameish but i vote for the 255 since you're doing 275 in the rear.

I run 275/40 on 9.5+22 front and i only have a SLIGHT rub. But then again im also lowered on eibach prokit. On stock youll be fine.

dboyzalter

iTrader: (3)

Decker you want anything less than 25mm the closer it is to 0 the closer you will be to rubbing or needing stretched tires.

A 10.5 +15 with meaty *** tires might poke a little a 10.5 with a 275 tire will likely be flush like you want it...

Keep in mind if your looking for light weight wide tires are not light weight and your 19lb wheel can easily become a 52 lb package deal

dboyzalter

iTrader: (3)

He should just buy one of your tire wheel combination.

MicVelo

EDIT: Sheesh, should have read ahead or typed less since T'Bo and DBA already anxered da q's.



First, on the tires, here are the choices (plus a few):

225 45% 18 25.97 Stock Reference Size
245 45% 18 26.68 Stock Reference Size

Fronts:
245 40% 18 25.72 Front-Alternate
255 35% 18 25.03
255 40% 18 26.03 Front-Alternate

Note that either of these work from a height perspective. The extra 10mm will fit just fine but if you're that worried about having to do the "fender bolt mod", go with the smaller size.

Rears....
275 35% 18 25.58
275 40% 18 26.66 Rear-Alternate
285 30% 18 24.73
285 35% 18 25.85
285 40% 18 26.98 Rear-Alternate

Again, if you are concerned about interference, go with the 275 (as you'd indicated) but you'll be fine with either. (And actually, I once bought a set of 10" wheels with 295s mounted and was very surprised how well they actually fit, even lowered.)

On wheels and proper offsets:

Generally speaking, on a 9.5/10.5 combination the "most" offset you'll want to run without interference is ~+15. Some variance may occur depending on brand tires and each car's actual sag/droop even with stock springs but for all intents, this is a safe number.

If any of your choices are in the +20mm range, that works too.

If you are still having problems with the "mathematics of offset", try this - what I like to think of as the graphical, Dr. Seuss version for understanding offset:

https://my350z.com/forum/wheels-and-...t-novices.html

terrasmak

iTrader: (8)

I always went for 255 fronts first, if the tire was not available in 255, I went with 245.

Increasing the stagger and making the car understeer more has never been a goal of mine, even when it was a daily driver. 245/275 combo under steers more than stock.

Makes me think, Nissan supplied a 245 and 265 combo as +sized for Z, keeping a 20mm stagger.

SPM350Z

iTrader: (1)

Guys..thanks for all the answers...appreciate it. Dboyzalter- I thought I had finally made the decision on not going square but you've got me thinking about it AGAIN...ha ha. I'l try and figure out which is going to be best for me....either way I'll with with 255 for the front wheels no matter what. I keep telling myself ANY of this will look better than my 17 inch wheel wagon rims but you know how it is...I want to get it perfect if I'm dropping the money for it.

turboed350z

depends on driver ability wouldnt you agree? for new driver understeer is better than oversteer.

turboed350z

support my dad mobile funds haha

honestly, ill probably end up saving 2 sets to run on my murano and hopefully a g35 for my dad mobile haha

dboyzalter

iTrader: (3)

Could probably use some wheels and the turbo kit on a nice quest. You will be the envie of the drop off lane in a few year's...

I had a tire rack cart all picked out with new tires and wheels then I look at the anniversary wheels on the car and im like but they look so good, if I had stock 17s buying new wheels would be so much easier.

I currently have my tent garage cargo strapped to my front wheels as a safety tether because its windy AF outside and I don't want to see it fly away...

Theirs also 3 s10wheels, a generator, and about 8 anchors holding it in place.

Spike100

I agree!

I currently have a 245/40-18” front and 275/40-18” rear setup, and this arrangement has way too much understeer.I don’t like it.

I previously had a 245mm square setup on width (front and rear), and I liked driving this much better than the “plowing” 245/275 setup.

dboyzalter

iTrader: (3)

I was thinking about doing a 235/40 front 255/40 rear but you guys make me want to go with 245/40F 245/45R so many choices...

Btw the continental extreme contact DWS is an all season tire, would be better off with the DW dry-wet tire... I have the DWS on my touring wheels they are fine but I dont think you get much snow in California...

Also probably not worth the extra cost.