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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 03-18-2013, 12:02 AM   #1
PaulBegnoche
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Need opinions/help with a stretched tire size and wheel spacers.

Hello, I am new in the stretching world and BMW lowering world. I am waiting to put my coils on because of figuring out the right tire size, and what spacer I will need if any.

I am looking to go with a stretched tire, and will be rolling my fenders as well. I have 18 inch ASA AR1 wheels. The FRONTS have a dimension of 18 x 8 with a 17 offset. And, the rears have a dimension of 18x9 with a 20 offset.

So, basically I want a suggestion to what to do for a tire size that will give a noticeable stretch, and be good for a bit more added clearance. Keep in mind I am rolling the fenders. I have the roller and heat gun waiting.

I also was wondering about WHEEL SPACERS. Will I need them? I heard you need in between a 27-35 offset in the front? Would this mean I would need in between a 9-17mm spacer? Or, am I thinking in the wrong direction.

Please someone help!!!!


BTW It's going into a 2000 323I 4 door.


This is them on there now with no coils, no roll, and a tire size that is totally away from what I'm looking for. So, right now it rubs when I hit a bump. Trying to get this done quick.


This is what I'm going for. I found this E46 in google. I'm heading in this direction with some stretch in the tire.







HELP!!!!!!!
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Old 03-18-2013, 09:03 AM   #2
lamsv
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There are too many factors involved with fitting aggressive wheels for any body to give you a definitive answer. For instance, camber plays a huge role in getting wheels to fit. How much negative camber will you be running, or are willing to run? Are you just going to roll your fenders, or give them a slight pull as well?

You are thinking the opposite when it comes to spacers. Spacers effectively make your offset LESS. So, adding a 10mm spacer to to a 18x8 et17 wheel will effectively make it an 18x8 et7 wheel. Spacers push your wheels further out.

As for your current wheels, those are pretty aggressive as is. Your current wheel specs (18x8 et17 and 18x9 et20) make me believe these wheels were on an E39. I would suggest rolling your fenders, lowering the car to where you want it, then decide if you even need spacers.

As for tire sizes, 215/40-18 up front, 225/40-18 out back... something along those lines if you are looking for some stretched tires.
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Old 03-18-2013, 09:43 AM   #3
PaulBegnoche
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Originally Posted by lamsv View Post
There are too many factors involved with fitting aggressive wheels for any body to give you a definitive answer. For instance, camber plays a huge role in getting wheels to fit. How much negative camber will you be running, or are willing to run? Are you just going to roll your fenders, or give them a slight pull as well?

You are thinking the opposite when it comes to spacers. Spacers effectively make your offset LESS. So, adding a 10mm spacer to to a 18x8 et17 wheel will effectively make it an 18x8 et7 wheel. Spacers push your wheels further out.

As for your current wheels, those are pretty aggressive as is. Your current wheel specs (18x8 et17 and 18x9 et20) make me believe these wheels were on an E39. I would suggest rolling your fenders, lowering the car to where you want it, then decide if you even need spacers.

As for tire sizes, 215/40-18 up front, 225/40-18 out back... something along those lines if you are looking for some stretched tires.

Thank you, yah my friend who usually helps me with this stuff literally just texted the same size tire. So, I guess it 215/40 in the front, 225/40 in the back.
And, I will be pulling the fenders slightly as well.

Stoked that you replied, I'm trying to learn this whole science of wheels. So, the spacer explanation was great. I was just thinking of making sure the et is away from the coils enough. I should look at some videos and explanation on this instead of trying to figure it out with my own sense. lol.

I'm just anxious to figure this out because I want to get this all fitted and together. And, will do what it take to not have problems with hitting/rubbing. So, first step is getting the tires.
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Old 03-18-2013, 10:46 AM   #4
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Easiset way to go about this is to roll your fenders, put on the coilovers and lower the car to the height you want, then install the wheels. That will show you how much clearence you have or will need. Every car is different.
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Old 03-18-2013, 01:27 PM   #5
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Quote:
Originally Posted by lamsv View Post
Easiset way to go about this is to roll your fenders, put on the coilovers and lower the car to the height you want, then install the wheels. That will show you how much clearence you have or will need. Every car is different.
+1

There is no one answer that fits all scenarios in this type of situation. So many factors play a part in how the wheels will fit.
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Old 03-18-2013, 03:49 PM   #6
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I guess I was hoping that someone with the same wheel dimensions/car, or someone who dealt with them in past that could throw some advice.


I'm deciding between:
Tire size of: 215/40 in the front, 225/40 in the rear and Tire size of:205/40 in the front and 215/35 in the rear.


I still am trying to figure out if I'm going to need spacers or not now. But, like I said I will be rolling the fenders, and possibly pulling them a bit as well. So, I guess it's a play it by ear situation.
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Old 03-18-2013, 04:02 PM   #7
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REAR


FRONT


Above is option one...

Rear

Front
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Old 03-18-2013, 04:05 PM   #8
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Front
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Old 03-18-2013, 04:50 PM   #9
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Be careful with that. You need to know the exact brand and model of tire you want to run. Every tire is different. Some brands run wide, some brands have side walls that bubble instead of stretch. If you want to compare pictures, you need to find the exact brand/model tire, in the size you want, on the exact sized wheel. Trust me. I researched tires for an old car of mine. I found pictures of a 225/40-18 on a 18x9. Looked like the perfect stretch. So, I bought tires in that size, mounted them, and they didn't stretch at all. Come to find out, the picture was of a Nitto NT555, and I had bought Falken 452's. The 452's, as most people will tell you, have square side walls, and they run large (just because it says it is a 225mm wide tire, doesn't mean it actually is).

Just don't want you to buy tires, only to find out they don't fit.
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Old 03-18-2013, 11:14 PM   #10
PaulBegnoche
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Quote:
Originally Posted by lamsv View Post
Be careful with that. You need to know the exact brand and model of tire you want to run. Every tire is different. Some brands run wide, some brands have side walls that bubble instead of stretch. If you want to compare pictures, you need to find the exact brand/model tire, in the size you want, on the exact sized wheel. Trust me. I researched tires for an old car of mine. I found pictures of a 225/40-18 on a 18x9. Looked like the perfect stretch. So, I bought tires in that size, mounted them, and they didn't stretch at all. Come to find out, the picture was of a Nitto NT555, and I had bought Falken 452's. The 452's, as most people will tell you, have square side walls, and they run large (just because it says it is a 225mm wide tire, doesn't mean it actually is).

Just don't want you to buy tires, only to find out they don't fit.
Thanks man I really appreciate the tip. And, being recently joined into E46Fanatics forum am pumped that the community is a actually social with each other. I tried a few forums, and the people either didn't talk. Or, just trash talked. But, once again thank you.
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Old 03-19-2013, 11:31 AM   #11
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Quote:
Originally Posted by lamsv View Post
Be careful with that. You need to know the exact brand and model of tire you want to run. Every tire is different. Some brands run wide, some brands have side walls that bubble instead of stretch. If you want to compare pictures, you need to find the exact brand/model tire, in the size you want, on the exact sized wheel. Trust me. I researched tires for an old car of mine. I found pictures of a 225/40-18 on a 18x9. Looked like the perfect stretch. So, I bought tires in that size, mounted them, and they didn't stretch at all. Come to find out, the picture was of a Nitto NT555, and I had bought Falken 452's. The 452's, as most people will tell you, have square side walls, and they run large (just because it says it is a 225mm wide tire, doesn't mean it actually is).

Just don't want you to buy tires, only to find out they don't fit.
Once again, I agree! This guy knows what he's talking about haha.

Speaking from experience, if you are trying to go for aggressive fitment there is no way for people online to say what fits for sure. You kind of have to pick and choose your parts, and work around it.
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Old 03-19-2013, 12:43 PM   #12
lamsv
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No my first rodeo...

No problem. Even if I didn't agree with what you are trying to achieve, I would rather help you be successful at it, than run the risk of ruining your car.
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