Maximum offset on a 10?

What's the highest offset on a 10" that won't rub? Say a 265/35/18. I heard synth19 spaced his 10 out to 25? I'm building a custom wheel can really use this info.

I'm running a 9" with a 275 at an et of -25 and I'm fine. Wondering how much more aggressive I can go. Without compression the tire already sticks out a hair. Since its not rubbing I'm assuming its moving inwards quite a bit on compression. .

I already answered this question for you in many other threads. It will vary on your ride height, tire size, and camber. You can run a wider offset on a lower car with low profile tires and a lot of camber that is not good for handling on track.

Billy, the wheel company wants exact details from me. Exact width, exact offset. It can be anything. You've talked about which ET you would go with given a choice between 2-3 premade wheels on what is available. For example on the Volks. But I need to give them a number down to the mm. So I am trying to get an exact baseline on what has actually cleared. What tire size, camber, and ET. I can work with ride height. What am I supposed to tell the wheel company right now? I know what tire size I prefer, and I know what wheel size that requires based on what we have talked about. If I guess and be conservative on the et, it comes at the expense of cancavity on the spokes. If you have an answer, and want to make my job easy, then I am all ears. I was trying not to pollute your thread with my personal stuff for a custom wheel.

TURBO2GO said:

What's the highest offset on a 10" that won't rub? Say a 265/35/18. I heard synth19 spaced his 10 out to 25? I'm building a custom wheel can really use this info.

I'm running a 9" with a 275 at an et of -25 and I'm fine. Wondering how much more aggressive I can go. Without compression the tire already sticks out a hair. Since its not rubbing I'm assuming its moving inwards quite a bit on compression. .

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You're running a 9" with a -25 offset??? I would LOVE to see pictures of that.
That's like taking Synth's 10" +25 offset wheel and adding almost 40mm of spacer!!

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What size tire do you plan to run and do you want it functional or for looks?

I don't know if this should be combined in the big wheel thread or not. As some point I may start talking about design and photos and I am not sure where it should go. Maybe I shlould have just commented on that thread.

The size I want to use is a 305-30-19 if I can make it fit. That requires an 11. As billy said, then you need less camber... so I don't know how much fitment becomes an issue. Is that just too much without wide fenders? I know Tyler and Synth have ran some crazy stuff in the rear. I don't need to be that low.

This is my old 19x10 +35 with 275/30/19s Kumho SPT
<img src="http://www.nsxprime.com/photopost/data/1265/IMG_050311.jpg" />

This is a 19x9.5 +23 (Equivalent wheel position to a 19x10 +29) with 275/30/19s Kumho SPT
<img src="http://www.nsxprime.com/photopost/data/1265/IMG_05161.jpg" />

My current wheels are 19x9.5 +25 with 275/30/19s Kumho SPT. Camber settings are maxed out to bring as close to stock camber as possible given the Eibach 1.5"+ drop. None of the wheel setups I just gave had any rubbing issues.

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TURBO2GO said:

I don't know if this should be combined in the big wheel thread or not. As some point I may start talking about design and photos and I am not sure where it should go. Maybe I shlould have just commented on that thread.

The size I want to use is a 305-30-19 if I can make it fit. That requires an 11. As billy said, then you need less camber... so I don't know how much fitment becomes an issue. Is that just too much without wide fenders? I know Tyler and Synth have ran some crazy stuff in the rear. I don't need to be that low.

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And why do you want to run 305-30-19s? Are you making your car a drag racer?

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Here's Bobolinski's 19x11.25 +48 with 315-25-19
http://www.nsxprime.com/forum/showthread.php/53275-New-wheels-and-tires

This is great info. So now I know that 9.5 at 25 still clears on the outside with a 275. Question is can an 11 be done? I think you cant go out any more even at a higher ride height don't you think? If we set the max going out as what you have now, we need another 1.5" INSIDE to get to an 11. Is there 1.5" of space on the inside on your 9.5 et 25 to your shock body? Have you ever taken a look?

I am running a 10.5 wheel with a 25 offset (265/30/19) tire. I am certain a 275 tire would fit.

Hapa88 said:

And why do you want to run 305-30-19s? Are you making your car a drag racer?

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Are you following Billy's thread? several reasons:

1) I am designing a custom wheel with which shaylorD and I are sharing costs. He has a 1000 HP car. I too am going twin turbo but will stay closer to 500.

2) The fronts we are using are 225/40/18 (he may go 235/40/18 if it can fit) per Billy's recommendation.

3) A 305-30-19 and 225-40-18 keep a close ratio to the stock difference

4) Excellent tire selection at this size, better than any of the others we have spoken about on the other thread

5) Need 18/19 to clear the ceramic discs we have.

TURBO2GO said:

I don't know if this should be combined in the big wheel thread or not. As some point I may start talking about design and photos and I am not sure where it should go. Maybe I shlould have just commented on that thread.

The size I want to use is a 305-30-19 if I can make it fit. That requires an 11. As billy said, then you need less camber... so I don't know how much fitment becomes an issue. Is that just too much without wide fenders? I know Tyler and Synth have ran some crazy stuff in the rear. I don't need to be that low.

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I gave you exact offsets for 10&10.5" wheels and 8&8.5" fronts for a DF setup. Not just Volk offsets. You just seem to repeat the same questions frequently and never ask for the camber of a given setup which is a crucial piece of information to know what it takes to make a given offset work. You're OP mentions a 265/35-18 which will not work with a 225/40-18. At this point I think you should stay with a 18x10 275/40-18 or 19x10 275/35-19 and call it a day.

Wow Bobolinski had an 11.25" in the rear at 48...

Dawk.... great looking car and wheels! Thank you for the pictures.

Billy there are two things with that... I can't have one size wheel and shaylorD another or else it costs a lot more. There are no real track tires at 275-35-19. Everything you yourself listed is a street tire... some good ones but no real R comps. And that is why I couldn't find it before. The NT05 is different than the NT05R and I was looking under competition tires. There are no Michelin cups, no R888, no hoosiers, no nittos. On the other hand, they are ALL there at 305.... so why not go with that size? huge selection, and shaylorD and I can share the wheel size. Do you have reservations about that with me?

I didn't realize SOS installed his motor yet to dyno?? They did and it made 1000hp on the dyno. Pretty impressive if that's the case.

No that is a crank estimate I think it is going on Monday. Still, it is a shitload of power and I think he needs a lot of sticky rubber.

you need to get under your car while the suspension is compressed,and take mm measurements from the hub face to the shock/spring combo and to a straight edge dropping down from your fender lip to give them something to design your wheels.Your desired ride height and camber should be set.

Yeah you're right Doc. I was going to actually put a jack under a tire and compress it so that I can get more exact. The thing is my rears already stick out beyond my fender. But I don't rub. They must be tilting in quite a bit on compression. My camber up front is low right now, it's maxed at 2.1 but they didn't clock my bushings correctly. So I need to do that first as you said then get the car on an alignment rack, and still jack tires and compress suspension for some measurements.

TURBO2GO said:

1) Wow Bobolinski had an 11.25" in the rear at 48...

Dawk.... great looking car and wheels! Thank you for the pictures.

2) Billy there are two things with that... I can't have one size wheel and shaylorD another or else it costs a lot more. There are no real track tires at 275-35-19. Everything you yourself listed is a street tire... some good ones but no real R comps. And that is why I couldn't find it before. The NT05 is different than the NT05R and I was looking under competition tires. There are no Michelin cups, no R888, no hoosiers, no nittos.

4) On the other hand, they are ALL there at 305.... so why not go with that size? huge selection, and shaylorD and I can share the wheel size. Do you have reservations about that with me?

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1) Bobolinski has done a lot of homework to find out the limit of what can fit under a stock fender. Thankfully he has very little camber, but has a very low profile and high ride height.


2) NT05R is a drag-radial. Not an R-comp track tire.

As I said on the 18/19 tire thread: "the idea is to choose a rear tire brand/model/list of various options, decide on a width, then decide your wheel width and offsets."

First you need to choose what tire you want to run. The whole point of the 18/19 thread was to utilize the best street tires on the market (PSS, RE-11, AD08R, S04, RS3, NT05, etc...). These tires really close the gap to the NT01 & R888 R-comp tires and are very streetable, so the point of these tires and sizes are to not need to swap back and fourth from street to track tires, but use a tire that will do everything very well. Plus the larger sizes will give you more durability (heat and wear wise) compared to a 17 or 18" rear size.

If you want R-comp track tires, pick a 265/35-19 or 295/25-19 Hoosier A6/R6, or R888. Or go with a 275/40-18 NT01 or R888.

**Be honest with yourself. Do you really need R-comps? Do you honestly know you can drive an R-comp faster than you could drive a PSS, RS3, or AD08R?

4) A 305/35-19 will have a 0.5" taller sidewall and a 1" larger diameter. That puts the top of the tire 1" closer to the fender than Bobolinski's 315/25/19 given the same ride height, in which case I think you will have a rubbing issue unless you add more camber -which may not be good for performance.


I've already done all of this math and have given you recommendations many times:

stuntman said:

I have the Conti DW street tire on my cars. I do not have the ContiFORCE Contact R-comp. No one knows for sure the ContiFORCE's wet or dry grip and IMO the NT01 is one of the best R-comps in the rain that's out there.

For your 18" front, you are going to need a wheel the clears your caliper (spoke wise) in either a 18x8 +36 or higher or 18x8.5 +42 or higher.

If you run a DF front fender, you can run an 18x8+28 (preferably +30) or higher or 18x8.5 +34 (preferably +36) or higher.

If you run a FXMD front fender, you can tack on another 7-10mm above the DF in clearance.

For the rear, you're going to need a 19x10 +30 (preferably +35) or 19x10.5 +37 (preferably +42) to clear the rear fender.

Tire wise, I'd look at 275/35-19 or 285/35-19 to be conservative in a RS3, NT05, PSS, or DW.


Another post:

RYU and I came up with 19x10 +35 and 19x10.5 + 42 will fit under factory fenders.

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Please feel free to spend the time and money to learn on your own, or to get the same information that I have gathered and draw your own conclusions without going to the level of correlation between offset, wheel width, tire width, tire size (sidewall height, width, diameters, etc...), camber, etc... that RYU and I have compiled over weeks of data gathering.

I'll give you some tools:

Offset and width tool (use Bobolinski's width/offset as a baseline for what fits, but without the correlation of camber and tire size, his outer and inner clearances won't always work):

http://www.1010tires.com/Tools/Wheel-Offset-Calculator#Results

Tire size calculator:

http://tire-size-conversion.com/tire-size-calculator/

All the homework and info has been done for you, but you choose to ignore it. Recommendations have been given to you as well as concerns when you mention going down certain paths, but you choose to ignore it. No one is forcing you to listen or for me to help, and I think enough as been said for you to make an educated decision on your own. However with your wheel guy, the spoke-caliper clearance could be an issue for your given offset without doing your own HW on your specific caliper dimensions.

Good luck.

Can't wait to see actual results

dawk said:

I am running a 10.5 wheel with a 25 offset (265/30/19) tire. I am certain a 275 tire would fit.

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What's your front wheel width and offset and tire size?

What's your F&R camber?

He wants to run a 275/35-19 or 305/30-19 which has a 1" larger diameter than your setup.

You can get a 19x10 et+30 with a 275/30 on a lowered NSX without rubbing, we have run that on at least 10 nsx's with a variety of suspension setups. Any more aggressive than that and you have got to get into stretch and camber ect.

I have ran 19x10 19mm with a 275/30 on my lowered NSX with no rub. The car was quite low, with as oem possible camber settings as the adjustments would allow. This was last year and I don't have the alignment print out, but I ran them without any issues.

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VERY important to note here, above all. Different tire BRANDS run different widths. For example, Falken fk452/453 seem to run narrower ie more stretch than others.

nsxot1c said:

I have ran 19x10 19mm with a 275/30 on my lowered NSX with no rub. The car was quite low, with as oem possible camber settings as the adjustments would allow. This was last year and I don't have the alignment print out, but I ran them without any issues.

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VERY important to note here, above all. Different tire BRANDS run different widths. For example, Falken fk452/453 seem to run narrower ie more stretch than others.

Click to expand...

I can also attest to the last statement. I have ran those Falkens and they do seem to stretch a considerable amount more compared to my S-drives.

Dave I think you need to choose a tire size and build back from there as Billy has been saying.

I know Doc. I have been spending a ton of time on researching this. For me it isn't just size but also weight is a huge factor for me. Both wheel weight and tire weight. Wheel weight doesn't increase much as you go up in diameter, it increases a lot as you go up in barrel width. Tires are all over the place and vary by as much as 4 pounds for the same size tire. I am close to a solution that I am happy with.

You obsess over the wrong numbers frequently and have a bad case of analysis paralysis. I'd pick a better tire even if it was 4lbs heavier.

I think this has been beaten to death in 2x other threads too... I hope the solution works and I applaud the research, but we all know what will fit without modification.

Those who chime in with aggressive offsets saying this and that either are
1. Lowered an extreme amount with excessive camber "not good for track and tire contact patch in the rear"
2. Have wider fenders
3. Are lying that they don't rub
4. Ignoring the facts
5. Aren't tracking their cars in their aggressive setup like you are so they're fitment info is completely worthless since your alignment and ideal specs will be fitted the complete opposite.

Let me even break down #5 for you. The people that run real aggressive widths and offsets set their cars to FIT the stance. You on the other hand should be fitting your alignment to fit the track "which I know you are".

In the end of the day the brakes are works of art, wish I had a set, but truthfully the weight savings isn't much to justify the cost+hassle+moving to heavier tires and wheels. All that almost offsets back to zero weight savings "for me anyways".

Like billy has mentioned in another post. Are you really that good to maximize the potential of one over the other. If so great, if not then you may need to rethink the train of thought. And if you really want to get quicker in regards to free advice post up a video. I'm sure billy, coz, iwlliem, ryu, docjohn, Tytus, the guy with the 50k track tool to take on 500k track tools "forget his name ATM", and MANY others that I forget that track will chime in.