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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 02-05-2013, 09:44 AM   #1
janel31
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Help on 20s" on a 330i

Hi guys i have 2004 330i and i have in my house a set of 20" with 255/30/20 tires that i took off my A4(sold) and i wonder if i can put adapters to put those on my car these are the specs: wheels 5 x 112, 20"x 8.5 et42mm.

How thick can the spacers be?
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Old 02-05-2013, 09:49 AM   #2
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don't bother.. way to big. you'll rub and will look like offroad

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Old 02-05-2013, 10:37 AM   #3
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Please don't put 20's on
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Old 02-05-2013, 10:54 AM   #4
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I would imagine that custom 5x120 to 5x112 adapters will be 20mm thick minimum. 25mm is probably more in line. Either way, you are looking at an effictive offset of 22 to 17mm on that 8.5" wide wheel. That will fit with rolled fenders, come negative camber, and stretched tires. This is also COMPLETELY dependent on if your car is lowered or not.

Those tires are WAY too tall and wide to fit with that aggressive of an offset. You need to swap to a 225/30.
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Old 02-05-2013, 12:10 PM   #5
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I would not recommend that fitment for your car with adapters. Thinnest adapters I've seen are about 15mm but most are 20-25mm.
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Old 02-05-2013, 12:15 PM   #6
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#1 rule, dont be a fool, nothing above 19"s on your transportation tool.


But srs. Dun do dat.
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Old 02-05-2013, 01:19 PM   #7
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Please no 20's. Its so rare to find an E46 M3 that can pull off 20's... much less a non-m sedan.
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Old 02-05-2013, 01:27 PM   #8
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Don't listen to the haters. If your car looks right. Say a nice lip and side skirts and the right drop, with the right wheels. You can pull off 20s.

That said. With your current offsets. I don't see how you're gonna get adapters to fit and make them fit. If u can find 15mm adapters. You MAY be able to make em work.
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Old 02-05-2013, 01:44 PM   #9
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This car is rocking 18x8.5 et15 all around. Seems to fit if you ask me. His fenders are rolled though. With a 25mm adapter, you would be sitting at 20x8.5 et17, which is 2mm less aggressive than this set up.

It will fit, just going to take some work.

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Old 02-06-2013, 04:21 AM   #10
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Thanks guys for the tips n info. I will sell this 20s to a friend, he want them for his A4. I also have an e92 328I with sport pkg i might install those on my 330i and put a set of Garde 355 on my 328i.
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Old 02-06-2013, 05:48 AM   #11
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This car is rocking 18x8.5 et15 all around. Seems to fit if you ask me. His fenders are rolled though. With a 25mm adapter, you would be sitting at 20x8.5 et17, which is 2mm less aggressive than this set up.

It will fit, just going to take some work.

18s vs 20s.
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Old 02-06-2013, 08:00 AM   #12
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^ IT DOESN'T MATTER 18's VS 20's. What matters is the over all TIRE DIAMETER. If you can keep the tire diameter close to stock, you can fit 20's. Having a 20" wheel means you just have 1" less of tire side wall compared to an 18.
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Old 02-06-2013, 11:18 AM   #13
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Actually I used to think that the wheel diameter didn't matter. It does. Same offset and widht on 18s will be easier to fit than 19s or 20s.
Anyway OP is doing the right thing anyway.
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Old 02-06-2013, 11:33 AM   #14
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If the tire diameter is the same, how does wheel diameter effect the ease of fitiment? I guess I'm confused...
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Old 02-06-2013, 01:12 PM   #15
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Don't listen to the haters. If your car looks right. Say a nice lip and side skirts and the right drop, with the right wheels. You can pull off 20s.

That said. With your current offsets. I don't see how you're gonna get adapters to fit and make them fit. If u can find 15mm adapters. You MAY be able to make em work.
He is right, cut the springs, 20's and talk to a member here who fabs his own custom lips. He might be able to make some side skirts too with his skills. Just don't let him put any stickers on your car.

Serious note, sell the 20's and buy the rims that are right for your car.
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Old 02-06-2013, 01:21 PM   #16
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If the tire diameter is the same, how does wheel diameter effect the ease of fitiment? I guess I'm confused...
It doesn't .. he's misunderstood.
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Old 02-06-2013, 01:28 PM   #17
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Should. Not. Have. Made. This. Thread.

I could feel flames the second I read the title.
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Old 02-06-2013, 03:58 PM   #18
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Originally Posted by lamsv View Post
^ IT DOESN'T MATTER 18's VS 20's. What matters is the over all TIRE DIAMETER. If you can keep the tire diameter close to stock, you can fit 20's. Having a 20" wheel means you just have 1" less of tire side wall compared to an 18.
It does. Good luck getting your 20s to be the same diameter as your 18s. Not gonna happen dude. Which means the radius is greater and puts the edge of the tire closer to the fender. Regardless of tire stretch.
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Old 02-06-2013, 04:00 PM   #19
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Originally Posted by |2eckLesS View Post
He is right, cut the springs, 20's and talk to a member here who fabs his own custom lips. He might be able to make some side skirts too with his skills. Just don't let him put any stickers on your car.

Serious note, sell the 20's and buy the rims that are right for your car.
Youre too new to the forum to have seen the OG members that ran 20s that looked so good. Most thought they were 19s.

The same argument also told me I couldn't fit a 10" wide rim on a sedan without serious fender work. Another forum myth.

Done right, 20s can look great on a sedan.
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Last edited by Snik; 02-06-2013 at 08:20 PM.
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Old 02-06-2013, 04:21 PM   #20
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225/30-20 is .23", or less than 6mm, taller than stock 205/50-17, or 225/40-18 (which ever OEM wheels his 330i Sport came with). Pretty sure that won't make or break his fitment if he went with 20's. The wheels offset, the state of his fenders (rolled or untouched), his ride height, and camber are going to have greater impact.

Just stating facts.
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