I posted a different thread and people keep trying to push rims on me. Its not helping so i opened a new thread.

I have a widebody kit and my front fenders are 10mm wider and rears are 30mm wider. From experience of those that read this thread. I have some questions.

What I want to know is,

What would the proper rim width without spacer need to be to fully fill the well with a small amount of poke?

Front? I was thinking 10JJ or 10.5JJ?

Rear? I was thinking 12JJ - 13JJ

Offsets for those rims. I have no idea. I am am going to talk to some vendors next week but I know vendors are on these threads so I thought I might jump the gun.

Any help, thanks.


What would the proper offset me for the fronts and rears?

 

10 in the front and 11.5 or 12 at the rear...

 

You say you want a small amount of poke. Having run a fiberglass widebody in the past on a previous vehicle, I would advise against running very aggressive offsets, especially in the front. You will crack the fenders, mark my words.

 

Crap, you serious.....

Were you running a stretched setup, what happened. Bottom out and that was it? I dont want the rim to look all tucked in the well. I want it flush.

What I was intending on doing was running an aggressive offset and camber with stretched tires that allows for the rim and tire to tuck into the well. Would that still cause problems?

 

Look in the stretched tire thread for guys set-ups with stock fenders. Note their wheel offsets and widths and tire size for the poke you desire. Add 10mm for the front and 30mm for the rear of both the wheels and the tires to compensate for your widened fenders.

 

I was trying to do that, I even posted a question that reflects this thread, today someone finally answered it.

I was trying to do exactly what you said but I dont know how the mm change to offset correlates with each other to make those determinations.

Its funny, I can put in a turbo by myself but I dont know crap about tires and rims.

 

This was suggested as a place to start.

Fronts 19x10-17 or 19x11-4

Rears 19x12-23 or 19x13-7

I would rather run 20's to get me higher off the ground for clearance when I am running low.

The setup would need to be different on 20's I would think.

 

Offset affects the placement of the wheel. Let's say someone had a 19x11 +0 rear wheel with a 245 tire on it - as horrible as that is to me - that you like, you can either:
-add 30mm to the offset and get the same wheel/tire combo OR
-add 30mm to the wheel and the tire. Since you can't do that exactly, you'd add 1" to the wheel and then factor another 5mm in to the offset to get the same look.

I think you will be unhappy with how the 20s affect your power. The 2 locals with FI and 20s always complain about it. You can adjust ride height with an intro coilover system.

 

I am currently running 20's with no issue, but then again, i have no idea what it feels like to run a smaller rim and gain the weight back. I do also have to think that I will be running a wider rim so there will be more weight to the rim as well.

I think you are right sir, 19's would be the way to go. I was going to get the top secret robutra suspension. Expensive I know but well worth it to save my body from road damage while moving around.

When you say zero that is a flush faced to edge of rim, +30 mm would push the rim inward, and give me the dish. Adding another inch to the rim would not increase the offset because it will still be +30 from the face, so because the rim is now wider to compensate, I would go to +35mm offset.

Did I understand you correctly.

I do agree 245 on an 11 is crazy, I would go 255 at the least. I will be buying VERY expensive rims and want a specific look but I also dont want to damage my rim from every day driving.

 

wheel size should have no effect on ride height if your tires are sized correctly. A 245/30/20 has the same diameter as a 245/35/19.

 

I did not run a stretched tire setup, or even that aggressive of a setup. I'm just telling you, if you try to run any sort of aggressive wheel/tire setup with fiberglass fenders it may look cool but it will only last a short while before you turn the wheel too much and or do so during a dip and it breaks the fender. I probably had about 10-15mm of fender clearance and it still caused some cracking issues.

Aluminum fenders are much more resistant to the type of abuse we put them through. Think about all the times you've rubbed, those are the moments you will crack/chip your paint or break entire pieces of fiberglass off your fenders. I don't know what you're currently running wheel-wise, but if it's not that aggressive right now and you don't ever rub, keep in mind that would change if you're trying to run something aggressive with poke.

I have a 20x9.5 front and 20x11 rear with offsets in the low/mid 20's. Currently running a 245 which is about flat, and a 275 in the rear which is a slight stretch. I just got new 275's for the front and 295's for the rear which should fit pretty well, though I am running a some neg camber to help with the fitment.

10mm additional clearance for the front is hardly anything, just over a 1/3rd of an inch. 30mm is just over an inch. When you're looking at the stretched tire threads, just keep in mind that if you try to go anywhere near as aggressive, even with the additional clearance, you will be risking your fenders. Think back and try to remember anyone running very aggressive offsets and even fiberglass front fenders. If you can think of any, maybe you should try to contact them and see how they are holding up.

I would recommend getting the kit installed with your current wheel/tire setup so you know your exact clearances. Then, knowing your current wheel widths and offsets, plug them into a calculator like:

http://www.1010tires.com/WheelOffsetCalculator.asp

Then look at wheel and tire threads to get an idea on what tire widths will look like on your wheel width choice, I.E. how much bulge, or lack there of, does a 265mm tire have on an 11" rim versus a 295mm tire on an 11" wheel. Getting an idea of the curvature of the tire is what you're after, though you also have to keep in mind that one brand's 265 will not be exactly the same as another companies 265, but it will at least give you a good idea.

Make sense? Like I said, just be careful. If you DD this thing, getting even something relatively "flush" could mean many a body shop visit for you in the future, and I'm by no means trying to get you to NOT DO anything, it's your Z and your money, I just wouldn't want you to create a money pit without even knowing the concerns of doing so prior to.

Good luck and let me know if you have any questions on offsets, widths, etc. It's not too hard at all once you grasp the fundamentals and have some of these tools at your disposal.

I'd also recommend checking out tire calculators as well:
http://www.1010tires.com/tiresizecalculator.asp

 

Ohh man you are so right, once I take this to the paint shop, I only trust my one guy, he is in ft lauderdale and I will be in VA then soon to be in HI, I wont be able to see him anymore, seeing someone else scares the hell out of me.

I trust you and what your saying, you sound like a man with much experience. I dont think I will be running as aggressive as I thought. I do remember rubbing a couple of time in the front because my tire was too tall I would have ruined my fenders right then if that was to happen after this kit.

Thanks for the links as well, they will be very helpful in the very near future.

 

No problem.

I also didn't notice that you're pushing 400hp. If I was you I'd want at least 285 or so in the back. You could probably do an 11.5 or 12" wide rim in the back, at about mid 20 offset and fit a 295 or 305 in the back for additional traction. I'd still recommend getting the kit installed and then use your current specs on those tools I posted earlier to be able to say with a lot more certainty what will or will not work.

Is this a Do Luck or Seibon widebody? Just guessing based on the 10/30mm clearances.

 

do luck, I will be a regular participant on those tools sites until i get my perfect setup prepared for order. You have been quite helpful with everything.

 

No problem at all nosurf. That should be quite the setup, always been a fan of the Do Luck kit.

Do you have a link to any current pics?

 

Here is a thread from the life of my Z lots of haters on there.

https://my350z.com/forum/exterior-an...e-of-my-z.html


Yeah, the kit i just let go is a love it or hate it kit, but I think I rocked it well.




It was time to move hence here I am.

 

Oh you're THAT guy? LOL J/K man I'm not into ragging people online.

I think this should be a big improvement and really help clean up the car. I was looking at eXe-Chris's car (yellow with Do Luck kit and black wheels, sure you've seen it on here) and it looks like he's running pretty aggressive offsets, BUT he is also running moderately stretched tires and ride height is pretty high which I'm sure also helps with rubbing, especially if it's stiff aftermarket suspension.

You should try to PM him for some details on his wheels as well if you're going with the same kit.

Best of luck man, can't wait to see the transformation! Have you already acquired the kit, I ask only because if you haven't I've heard the kit is extremely hard to get your hands on.

 

I am talking with chris actually, I have hit him up with many questions. He car is hot. I did noticed that his wheels are really tucked in the well though. I wanted mine a little more flush. I am probably going to have some of the fender cut away and have it reinforced on the inside to prevent cracking. The lip of the fender is somewhere around 1" I will get it cut to 3/4 of an inch probably and inside have that 3/4 reinforced above it.

Yes I have the hookup on the kit already, paid the last bit today.

I appreciate it, I will be posting up pics as soon as it is done.