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Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack Specific topics relating to wheels and tires.


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Old 10-16-2018, 12:59 PM   #15
KnightRyderx2
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Did some great work on this. Awesome job!

I guess one thing I am seeing is wheel to strut engagement. I put a 18x9.5 offset +40 with 245/35 in there and its saying -7mm in red suspension distance, which I'm assuming means its not going to work. I'm also assuming that your calculation is setup for only OEM strut, is that right? I know this setup works on aftermarket coilover setups but im not 100% sure about OEM. I have seen posts about it working with OEM and some that it does not work.

Maybe something to take into account would be stock strut vs. coilover. I would just do two values OEM and aftermarket keep it simple. Most aftermarket coilovers are same width anyways.
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Old 10-16-2018, 07:20 PM   #16
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I got another one. When you lower the car with the "coilover" setting, it automatically changes visual of the rear tire (and front not quite as much) to show it have more negative camber as it gets lower, which is a real nice touch.
It does indicate it in green under the box. The problem is it doesn't show that total change in the "camber" setting box. Maybe I'm wrong on this but I also thought on that 1" lower spring it was always sitting closer to -2
in rear where the visual shows it and also below the camber box "-1.0" in green at that height. I ended up having a 1.2" drop with the TRD springs and my rear is -2 and the calculator shows a -1.2 in green.

In fact I just realized my post here where I thought the visual was off was just the camber setting thing happening here:
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Works pretty great. I could be wrong but it seems like the rear should be about 5mm further out than it says.
Too bad about anybody not driving an Argento or Steel FRS though, they'll have to use something else.
If you add something in that can overlay in different wheels and also back up to see the whole car, I think it can't be beat.
Then the ability to change the car color and this is the ONLY wheel and tire fitment calculator that anybody in here would use.
With that change to show total camber change in the box would fix what I thought was 5mm off in the visual of the wheel/tire on the car.

Right now if I change the camber setting to -0.8 in the box plus the green -1.2 below, that is a total of -2 and that is exactly how that setting looks like in real life with a 1.2" drop.
All that has to be done is make that coilover box indicate what the camber becomes automatically as you lower it.
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Old 10-16-2018, 11:13 PM   #17
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Originally Posted by KnightRyderx2 View Post
Did some great work on this. Awesome job!

I guess one thing I am seeing is wheel to strut engagement. I put a 18x9.5 offset +40 with 245/35 in there and its saying -7mm in red suspension distance, which I'm assuming means its not going to work. I'm also assuming that your calculation is setup for only OEM strut, is that right? I know this setup works on aftermarket coilover setups but im not 100% sure about OEM. I have seen posts about it working with OEM and some that it does not work.

Maybe something to take into account would be stock strut vs. coilover. I would just do two values OEM and aftermarket keep it simple. Most aftermarket coilovers are same width anyways.
You are right, the distance from suspension is with Stock suspension. I take note, maybe I could add an option for aftermarket coilovers. Thank you
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Old 10-16-2018, 11:19 PM   #18
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Originally Posted by Impureclient View Post
I got another one. When you lower the car with the "coilover" setting, it automatically changes visual of the rear tire (and front not quite as much) to show it have more negative camber as it gets lower, which is a real nice touch.
It does indicate it in green under the box. The problem is it doesn't show that total change in the "camber" setting box. Maybe I'm wrong on this but I also thought on that 1" lower spring it was always sitting closer to -2
in rear where the visual shows it and also below the camber box "-1.0" in green at that height. I ended up having a 1.2" drop with the TRD springs and my rear is -2 and the calculator shows a -1.2 in green.

In fact I just realized my post here where I thought the visual was off was just the camber setting thing happening here:

With that change to show total camber change in the box would fix what I thought was 5mm off in the visual of the wheel/tire on the car.

Right now if I change the camber setting to -0.8 in the box plus the green -1.2 below, that is a total of -2 and that is exactly how that setting looks like in real life with a 1.2" drop.
All that has to be done is make that coilover box indicate what the camber becomes automatically as you lower it.
Exactly, the number between ( ) is what I call "Coilover natural camber". When the suspension drops, it creates camber (more on the back). Maybe I could do something to specify that. I take notes for futur update.

Thanks for the feedback
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Old 11-12-2018, 10:46 PM   #19
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Currently I have a new set of wheels that are 18x8.5 +48(offset) and a new set of tires that are 245/35/R18. I put it in your calculator and I can't not tell it fits or not, but today I went to the went to try the installation, my tech told me it's not gonna fit, it require a spacer. Can you help me?

Good work btw.
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Old 11-15-2018, 05:28 PM   #20
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Currently I have a new set of wheels that are 18x8.5 +48(offset) and a new set of tires that are 245/35/R18. I put it in your calculator and I can't not tell it fits or not, but today I went to the went to try the installation, my tech told me it's not gonna fit, it require a spacer. Can you help me?

Good work btw.
Your tech is correct those wheels are not gonna fit. With 18x8.5 wheels you need at least a +44 or +45 offset. You can just get like a 3-5mm spacer and it should fit.
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Old 12-16-2018, 01:57 PM   #21
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Thanks, dominicpadawan. This tool helped me out so I had to drop some money in the tip jar. (I don't have enough posts to do a "thank you" on this board yet... lol)
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Old 12-19-2018, 04:04 PM   #22
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In using this calculator my ideal aspect ratio is 30. I see a lot of members running 35. What are the reasons for this? Corrected speedos thru tuning? Strecthed tire width that decreases the overall height? More available tires in 35? Thanks for any advice.
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Old 12-19-2018, 04:08 PM   #23
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This. is. amazing.

Thank you.
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Old 12-19-2018, 04:10 PM   #24
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In using this calculator my ideal aspect ratio is 30. I see a lot of members running 35. What are the reasons for this? Corrected speedos thru tuning? Strecthed tire width that decreases the overall height? More available tires in 35? Thanks for any advice.
More info on what size tire you want is needed to give you an answer thats meaningful.

Generally speaking, if you are considering a 30 series tire, then you are looking at 19s. IMO, 18s are plenty big.
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Old 12-19-2018, 04:13 PM   #25
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More info on what size tire you want is needed to give you an answer thats meaningful.



Generally speaking, if you are considering a 30 series tire, then you are looking at 19s. IMO, 18s are plenty big.


Your right I am looking at a 19. 235/30 or 245/30.


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Old 12-19-2018, 04:39 PM   #26
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Your right I am looking at a 19. 235/30 or 245/30.


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Limited availbility in those sizes and tire cost is something to consider. What width and offset are you thinking?
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Old 12-19-2018, 04:42 PM   #27
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Limited availbility in those sizes and tire cost is something to consider. What width and offset are you thinking?


Yea those things are what brought me here with the question of the 235/35 and 245/35. The wheel would be 19x9.5 40offset


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Old 12-19-2018, 04:49 PM   #28
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Yea those things are what brought me here with the question of the 235/35 and 245/35. The wheel would be 19x9.5 40offset


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Do you have coilovers? Because those are not going to fit without them in the front.

Or by adding a spacer. Otherwise you will rub the spring perch.
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