finalfantasy316

iTrader: (2)

I'm looking for advice. I currently have 235/35/19 up front and 295/30/19 on the rears. When i first got the car i Didn't know anything about wheels and tires (still don't i guess lol or i wouldn't need advice) and just went to a local wheel shop and they threw these rims on. The problem i am having is with the offset, my tires stick out past my fender and im sick and tired of not being able to go anywhere without messing tires up (taking chunks out when i hit a bump). i know its my fault but i am looking to correct that now with help from you folks.

I want to get new Wheels and Tires. I want to stick with 19's and go with potentially 8.5 up front and definitely 10.5 rear. I would like to throw some 305's (im gonna guess 305/30/19) on the rears. My fenders are not cut/rolled but ill have that done no problem. So the questions are, what size tire do you recommend for the fronts? What offsets am i looking at for the front and rears with no fender rubbing? What if any Camber adjustments would be recommended? Not sure if this matters but I've got BBK all around too.

I don't want to just call up my local rim shop and ask about these specific things so i figured id leave it to the pro's on this forum for the CORRECT answers.

Thank you all very much in advanced for the help.

Spike100

This is a very open question that begs for quite a bit of debate. I would search the tire and wheel threads for various opinions. You will gain most practical information from the Enkei thread.

mr. sparco

iTrader: (13)

What are the exact specs of your wheels now? That would help in gauging what you need to change. A fairly standard 350z size would be 19x9.5/10.5 +22 F/R setup. If you are rubbing the 295/30 tires now, then 305s will definitely cause more problems on the same wheels.

finalfantasy316

iTrader: (2)

Ill try to find info on my current rims. I just assumed the offset on them was pretty low and thats why i was rubbing with my 295's. I am definitely getting new wheels. Im not even going to attempt to put 305's or any new tire at all on my current wheels. Im also trying to minimize the need for spacers but i am certainly not opposed if needed.

finalfantasy316

iTrader: (2)

So they're RUFF Racing wheels. Discontinued of course. Here's a pic of how they stick out and you can even see where some of the tire is kind of shredded.

finalfantasy316

iTrader: (2)

I am wanting these if its possible. They're the MRR Groundforce GF06's

Sorry a Mustang was the best pic i could find of them to show a gloss black on black look.

mr. sparco

iTrader: (13)

I bet if you rolled your fenders with a mild drop it would clear easily. Those don't look to be very aggressive specs.

finalfantasy316

iTrader: (2)

according to the manufacturer these are offsets that fit. this is where i need help i suppose. The bottom portion of the pic are for the rears and the top are for the fronts. Fronts are 19x8.5 and Rears are 19x10.5. I would like to put a 305 on the rears and im honestly not sure for the front. These are the questions needing answers before i can hit the buy button

finalfantasy316

iTrader: (2)

i will be rolling the fenders for sure. I also just kinda want a new look and ive got some spare money for some rims and new tires as well. I just want to make sure i get this right

MicVelo

First things first, measure the offset on your existing wheels. Knowing this will give you some idea of what to expect, fitwise of 295/305+ size tires on whatever wheels you choose.

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

MIstuh Sparco quoted 19x9.5/10.5 +22... which are just about a perfect fit and with 245/275, generally no roll needed. 255/285 and above, will almost certainly require such at the rear. Honestly, unless you're tracking the car, going above 275 only buys swag points as you will never get the temps up into maximized operating temps. I run 255/285 combination and have never managed to push them hard enough to see higher than 120 degF after a solid hour long run in the hills. All my other wheels wear 245/275 and on a similar run, I can get 'em to about 130 tops. But nothing wrong with going tor "a look" if that's the goal. (Or if the boost compels you.... Laff.....)

Examples:

19x9.5 +20 (effective) F & 19x10.5 +23 R 255/35 & 285/35 - Nissan LMGT5 (Z34 Nismo)





Same tire and wheel sizes as above, all +22 offset F&R - AME TM02 (Enkei built forged)

Of course, you already know you need brake clearance. No idea of whether those wheels you want will clear but make sure you get a chance to try them (with a return policy) before tire mounting.

finalfantasy316

iTrader: (2)

Okay ill try to get those measurements very soon. You're right there's no telling if the wheels will clear the brakes or not, ill have to order them once i get this offset thing down and see if they clear the brakes before installing tires as mentioned above. I guess ill have to see how far a 305 will stick out past the wheel as well. Makes me just wanna get the +30mm wheels, throw everything on and just use spacers from there lol.

finalfantasy316

iTrader: (2)

and i guess the reason for the want of the 305's was just the thought of more meat meant more traction. I break lose with the 295's I've got now. Yokohoma Advan AD08's and yes maybe a little bit for the looks too lol

finalfantasy316

iTrader: (2)

Ok so I just pulled my wheel off. I measured what I think is the offset and got around +19. After pulling the wheel I noticed these tears are actually 19x9.5. Also stamped on the inside of the wheel is an ET20 which based off of google translates into a +20 offset for my rear wheels. This is also taking into account that my 295/30/19 tire is sticking out roughly 7mm from each side. So 14mm Total.

MicVelo

14mm?? No, the wheel is +20. Period. So based on that, use the calculator to determine a good size wheel if you want to run 295+

https://my350z.com/forum/tire_rim_calculator.php

You need to pull the tire/wheel in at least that 7mm so start plugging in wheel sizes and compare to what's on now, your 9.5" +20. Off top of head, I'm guessing you'll need a 10.5" wheel (to properly fit that much tire) and an offset around 30. That's just an estimate to start with.

finalfantasy316

iTrader: (2)

So maybe instead of ordering the wheels myself i can have a local wheel shop do all that for me and test fit them. in case they don't work out they can deal with returns and what not. Thank you very much for all of your help. Thanks for the links as well. I have definitely learned something through all of this and am still learning.

I guess ill have to take my front wheel off as well and see what the offset is. then determine what size tire to go with and what offset i need for that.

Thanks again,

finalfantasy316

iTrader: (2)

ok, both fronts and rears are +20 offset. After some looking i think +30 in the rears out of the selections available would be the best bet. After some more searching i see most people like to go with either a 265/275 up front. Im thinking i like the 275 up front probably +25 offset. I don't mind having to use a couple mm spacer (potentially to get a more flush look). Camber is pretty much stock, i don't mind having to take it a couple degrees if needed. I know i want more meat on the ground though being FI and all.

I think this may be a pretty decent base to start off with and since im gonna do this through a local shop that will allow me to swap anything out if needed with less hassle on my end.

If you folks think sounds about right im on to my next struggle and thats tires

I want some pretty good grip but i also don't want to have to change my tires every 6 months so R888R's are out. Plus they seem to run a little wider than most other 305's. I see alot of people like the potenza re 11, michelin ps2 and ps4s Cheapest ill go is Nitto 555. does anybody have any recommendations?

Thanks again for your help, i know a good amount about cars but never dabbled in the whole wheel/tire thing to much. This is a good learning experience for me, Clearly i am newb

finalfantasy316

iTrader: (2)

if im thinking correctly then a 19x10.5 +30 still might stick out a little bit. coming from where im at now (19x9.5 +20mm) the calculator says my inner clearance will be 23mm less (which is fine i've got more than double that to spare from my suspension) and +3mm outer position. Right now im about 10mm out since the tire sticks out 7mm past the wheel, which means even minus the tire my wheel is still currently 3mm out. So a 19x10.5 +30mm would put me out +6mm past my fender. is this correct or am i just all messed up here and need to stop lol?

MicVelo

The problem here isn't the wheel, it's the tires you want to run. I had 11" wide wheels at one time with offset in mid-20s BUT with a more modest tire, I think a 275/40-18. The tread width you're talking about is an inch+ wider than that. I have NEVER had any issues with a 10.5" rear wheel with offsets in the 20s, even lowered (only 19mm) and stock fender lips (rolling didn't become necessary until I ran 9.5 +15s!) Now, with roll, I fit my 285s on 10.5" wheels without a single clearance issue. Zero.

EDIT: I take that back..... the 11" wheels were +25mm offset with 295/40-18s and no clearance issues. Just looked back at my tire/wheel spreadsheet (that documents "Mic'sRealWheelAdventures", and the spreadsheet is even so named. Yeeesh, I've bought a lot of wheels for this car!! Yikes. But I've sold most of them. Laff....)

finalfantasy316

iTrader: (2)

could i go with a rear wheel that has a little more offset to allow for the width of a 305?

mr. sparco

iTrader: (13)

If the width of the wheel with too high of an offset, you risk rubbing on the inside against the suspension or body parts.

Check this thread, lot more info.

https://my350z.com/forum/wheels-and-...es-thread.html