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What size spacers do I need?

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Old Dec 7, 2016 | 09:58 AM
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Default What size spacers do I need?

Hey guys first time user here. Got a question. Recently got a set of four Rohana Rc10s for my 350z. All 19X9.5. What spacers would you guys recommend to give it a nice flush look? Im on stock suspension and at the moment don't plan on lowering it. Any help will be greatly appreciated. Thanks guys!
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Old Dec 7, 2016 | 10:40 AM
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You need to tell us the offset on the wheel. Offset and width are both equally important to determine where the wheel will sit.
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Old Dec 7, 2016 | 11:55 AM
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return them and get proper offset wheels..... better than spacers
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Old Dec 7, 2016 | 03:47 PM
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Sorry I forgot! The offset is 40!
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Old Dec 7, 2016 | 03:54 PM
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Does that really help answer my question? Do you really think I'm going to pack them up and ship them back cause you told me to? I like the wheels and just want to know some recommendations on spacers. When you were typing that did you think "this is definitely the best answer to his question". Thanks for nothing
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Old Dec 7, 2016 | 04:18 PM
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The offsets are extremely high. To the point where the spacers are going to be so large that I would look into getting new wheels down the road.

A 25mm spacer in the front will work for you. But in the back you'd need like a 35-40mm spacer to look how you want it to.
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Old Dec 7, 2016 | 04:24 PM
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Originally Posted by awebber
Does that really help answer my question? Do you really think I'm going to pack them up and ship them back cause you told me to? I like the wheels and just want to know some recommendations on spacers. When you were typing that did you think "this is definitely the best answer to his question". Thanks for nothing
Look tardo if you knew anything you would know that shiit wheels you bought are too sunken in, factory offsets are in the low 30s. Send them back and use the money you will spent on spacers to get proper wheels.

Last edited by travlee; Dec 7, 2016 at 04:26 PM.
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Old Dec 7, 2016 | 04:36 PM
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^^^ What CJM said.

At least 20-25 (on your 9.5 fronts) for close to flush. Rears definitely 25mm+

I run 20mm spacers on my Z34 wheels (on Z33 front) with effective net offset of 27 and that's fine for me up front.





But if you look closely, could easily run 25-30mm (not that I'd ever run anything that large!) spacers and still have no fender interference issues.

For reference, these are 19x9 (+47mm!) fronts and rears are 19x10 (+30mm). These are factory Z34 accessory wheels.

EDIT: Should note that the other guys aren't wrong in suggesting considering other wheels later on.... These are +15mm 9.5 square, thankfully no spacers needed.


Last edited by MicVelo; Dec 7, 2016 at 04:45 PM.
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Old Dec 7, 2016 | 04:41 PM
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Thank you very much! Is it bad they are large spacers in the back? I attached a pic of something that I'm looking for. Is there a reason I would have to get different wheels?
Attached Thumbnails What size spacers do I need?-img_0216.png  
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Old Dec 7, 2016 | 04:53 PM
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Originally Posted by awebber
Thank you very much! Is it bad they are large spacers in the back? I attached a pic of something that I'm looking for. Is there a reason I would have to get different wheels?
No, you don't NEED to get new wheels, just a recommendation maybe down the road.

What I would do is mount your tires up, put the wheels on the car with no spacers. Measure how much space you have to bring them out. It will be somewhere in the 20-30mm range (30 if you plan to roll the fenders).

Then use the tire calculator found here: https://my350z.com/forum/tire_rim_calculator.php and play with the offsets to see how much spacer you need to add. It will probably be in that measured range from above.

But I caution you that adding too much spacer to the car with unrolled fenders will have you scrambling to find someone to roll 'em. Ask me how I know..... after 10 sets of wheels with nary a single clearance problem (even lowered) because I ran wheels in the +22 to +25 range, I found myself in that predicament when I finally went with the RPF1s in +15 offset.

Not a huge deal but beware.
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Old Dec 7, 2016 | 05:02 PM
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Yeah definitely don't want to roll the fenders or anything haha. I guess I'm just looking for the safest amount I can do eithought sacrificing drivability or reliability.
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Old Dec 7, 2016 | 05:42 PM
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Fender rolling is easy and will take you less than an afternoon. I recommend doing it personally.

Adding spacers is always going to add some level of "danger" to the car as it isn't a direct connection between hub and wheel. A quality space will eliminate some of the risk, but it is still there. Larger spacers = larger risk. You will more than likely be fine, but that is why we recommended getting wheels with widths and offsets that better suit the car
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Old Dec 7, 2016 | 06:38 PM
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Thank you so much for all the help guys! I'll take everything into consideration!
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Old Dec 12, 2016 | 05:13 PM
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Not to hijack the thread, but I am curious what the general opinion is of Rohana wheels. I too am looking into a set of RC10 wheels. I was thinking of going 20x11 for the rear and 20x10 for the front. I came across a car on YouTube that runs this setup and I really like the look. Are Rohana wheels any good for the price ($1600ish for a set)? Thanks
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Old Dec 12, 2016 | 05:33 PM
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Why do you want 20's
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Old Dec 12, 2016 | 06:02 PM
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Because all the cool kids have 20s
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Old Dec 12, 2016 | 06:53 PM
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Why do I not want 20s? The car I came across on YouTube is running 20s and I really like the look? Is it bad to run 20s? I don't race or run track.
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Old Dec 13, 2016 | 02:55 AM
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heavy, expensive tires, affect acceleration and the car wasnt made to run on 20s. the speedo will be off
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Old Dec 13, 2016 | 04:06 AM
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Originally Posted by travlee
heavy, expensive tires, affect acceleration and the car wasnt made to run on 20s. the speedo will be off
Those are some very good reasons. Thank you for the feedback. Are we talking significant effects, like 10-20% reduction and calibration losses or barely noticeable changes?
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Old Dec 13, 2016 | 05:27 AM
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It's more that everyone that looks at the car with big baller 20s throws up a little in their mouths, and feels bad for the poor Z
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