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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 01-06-2013, 04:24 PM
Adnan23 Adnan23 is offline
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Location: Los Angeles, CA
 
Join Date: Sep 2012
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Mein Auto: 2006 750i
21" Versus 22"

Hello guys i just purchased a 2006 750i sport package and need advice on purchasing wheels. Please keep in mind that i drive about 90 miles per day, 5 days a week.

Heres some background:
I had a 750Li (Sig Pic) about a month ago and i had purchased 22" Asanti AF128's with 3" lip in front (255/35/22 tires), and 3.5" in the back (295/30/22 tires). These wheels were made for a Chrysler 300 so i had the center bore custom drilled to fit my car car along with having it drilled for my 5X120 bolt pattern, and then i had everything balanced and aligned. The car drove very sluggish with the wheels but looked good lol. Im pretty sure it drove like that because the wheels were adjusted to accommodate my car.

Now i am in the market for some wheels and am considering the 21" 128 style wheels which i see alot of members have. I found a good deal with some nice pirelli tires. I will just get them painted jet black to match my car. My other option are some 22" Asanti's 3" lip up front and 5" in the back but this time they will be made for a BMW from the factory.

Which wheels should i get ? What are the pro's and cons of each in ride quality and performance? The price is not an issue as i am able to get either set for fairly the same price. I dont want to buy them and just have to sit them in the garage again if they are going to ride sluggish. Please help me with any advice you have.

Thank you all!!!!!
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  #2  
Old 01-06-2013, 05:47 PM
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First_745Li First_745Li is offline
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Look in my photo album for the Beyern Multi in 22's.
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  #3  
Old 01-06-2013, 06:50 PM
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csmeance csmeance is offline
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If you put the wrong tire size on your 22's then it can feel sluggish. As well if the wheels are heavier or as heavy as the factory ones they can cause slugishness. This is due to 3 reasons:

1. Rotational weight is equal to about 3x stationary weight, so a heavier wheel will require 3x the power to move compared to adding normal weight to the car.

2. The further the weight is pushed AWAY from the hub (IE a 22" rim vs an 18" rim) the more energy is required to move it.

3. A larger OVERALL diameter of the tire/wheel combo can effect the "final drive" of the car. If the wheel/tire are larger than factory size then the car is effectively "geared up" so it feels like your driving the car in 1 gear higher than it should be. Similarly if you decrease it it'll gear down and feel like your 1 gear lower.
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  #4  
Old 01-07-2013, 04:49 AM
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gmcclintock gmcclintock is offline
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Location: Alabama
 
Join Date: Aug 2009
Posts: 923
Mein Auto: 2006 750Li
Quote:
Originally Posted by csmeance View Post
If you put the wrong tire size on your 22's then it can feel sluggish. As well if the wheels are heavier or as heavy as the factory ones they can cause slugishness. This is due to 3 reasons:

1. Rotational weight is equal to about 3x stationary weight, so a heavier wheel will require 3x the power to move compared to adding normal weight to the car.

2. The further the weight is pushed AWAY from the hub (IE a 22" rim vs an 18" rim) the more energy is required to move it.

3. A larger OVERALL diameter of the tire/wheel combo can effect the "final drive" of the car. If the wheel/tire are larger than factory size then the car is effectively "geared up" so it feels like your driving the car in 1 gear higher than it should be. Similarly if you decrease it it'll gear down and feel like your 1 gear lower.
Wonderful information very informative.
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  #5  
Old 01-07-2013, 01:56 PM
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First_745Li First_745Li is offline
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Quote:
Originally Posted by gmcclintock View Post
wonderful information very informative.
+1
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  #6  
Old 01-08-2013, 03:44 PM
vaed2010 vaed2010 is offline
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Mein Auto: BMW 745li
Hey First_745Li What kind of rim and tire setup do you have? Also, what's your ride quality?
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  #7  
Old 01-08-2013, 03:56 PM
mrbmwx5 mrbmwx5 is offline
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Quote:
Originally Posted by vaed2010 View Post
Hey First_745Li What kind of rim and tire setup do you have? Also, what's your ride quality?
Read posted #2.
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  #8  
Old 01-08-2013, 04:07 PM
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First_745Li First_745Li is offline
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Quote:
Originally Posted by vaed2010 View Post
Hey First_745Li What kind of rim and tire setup do you have? Also, what's your ride quality?
Beyern Multi in 22's
Tires are FRONT: 265/30/22 REAR: 295/25/22

The ride is pretty good/smooth, no shakes or vibes.The ride is as good as your going to get with 22's and next to nothing for tires..
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  #9  
Old 01-09-2013, 05:13 AM
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Nygel Nygel is offline
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Mein Auto: BMW 750Li
remember you can only go a 17% difference in rotating mass before items will need to be corrected. The percent is on the high side I believe.
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  #10  
Old 01-13-2013, 12:09 PM
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oktane98 oktane98 is offline
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Can't go woring with the 128's....they look fabulous!!!
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  #11  
Old 01-13-2013, 07:02 PM
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First_745Li First_745Li is offline
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Quote:
Originally Posted by oktane98 View Post
Can't go woring with the 128's....they look fabulous!!!
For sure!
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