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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Ineresting Info about BBS Wheels



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Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.
    Current Wheel Width  inches             Current Wheel Offset  mm.
         New Wheel Width  inches                  New Wheel Offset  mm.
 
TIRE WIDTH
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ASPECT RATIO
- WHEEL DIAMETER
ORIGINAL TIRES
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NEW TIRES
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Based on your stock wheel setup, your new wheel will have:
Original Tires Diameter (in.)
      New Tires Diameter (in.)
  Difference in diameter (in.)
           Percent Difference %
                     
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      12-07-2007, 03:42 PM   #1
jimlai322
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Ineresting Info about BBS Wheels

They talk about die forging vs regular forging if anyone is interested. Also information regarding upgrading to larger wheel sizes.

http://asia.vtec.net/Reviews/EibachBBS/index.html
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      12-07-2007, 07:08 PM   #2
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thx
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      12-07-2007, 09:09 PM   #3
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good article.
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      12-07-2007, 09:13 PM   #4
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fun fact:

BBS's are the shit.

that is all.
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      12-08-2007, 01:08 AM   #5
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Quote:
Originally Posted by Suareezay View Post
fun fact:

BBS's are the shit.

that is all.
+1

Thanks for sharing Jim.
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      12-08-2007, 01:09 AM   #6
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      12-08-2007, 12:21 PM   #7
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Good info about how the forging process works. Thanks for the post.
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      12-08-2007, 12:58 PM   #8
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what a BIASED and MISLEADING article.

"Rather than using the cheaper and more common A6061 Aluminum Alloy... BBS wheels use a more superior (and expensive) aluminum alloy".

To the person who knows nothing about materials and wheel construction technology it`ll surely impress. However, it is obvious their wheels are made using a higher grade aluminum than A6061. A6061 is only used by low-end gravity cast manufacturers. Why don't they list what grade they use? Maybe because it is the same A6061-T6 used by everybody else? Including Volk? Neez? MORR? RAC? Champion? and dozen others? I highly doubt they use A7075-T6 aluminum on their wheels. Although the 7075-T6 aluminum has a much higher strength to weight ratio, it does have a higher tendency of cracking than 6061 T6 does and weights more.

Also, BBS-Japan uses 5000TON of forging pressure versus the other manufacturers using 8000-10000TON in the same 3-stage process? FYI, all die-forged wheels are built using a 3-stage forging process.

BBS wheels are great, but I applaud BBS-Germany for their success and innovation and feel a terrible shame about BBS-Japan releasing biased and mis-informative articles to get their company out of bankruptcy.
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      12-10-2007, 04:13 PM   #9
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Quote:
Originally Posted by crimsone90 View Post
what a BIASED and MISLEADING article.

"Rather than using the cheaper and more common A6061 Aluminum Alloy... BBS wheels use a more superior (and expensive) aluminum alloy".

To the person who knows nothing about materials and wheel construction technology it`ll surely impress. However, it is obvious their wheels are made using a higher grade aluminum than A6061. A6061 is only used by low-end gravity cast manufacturers. Why don't they list what grade they use? Maybe because it is the same A6061-T6 used by everybody else? Including Volk? Neez? MORR? RAC? Champion? and dozen others? I highly doubt they use A7075-T6 aluminum on their wheels. Although the 7075-T6 aluminum has a much higher strength to weight ratio, it does have a higher tendency of cracking than 6061 T6 does and weights more.

Also, BBS-Japan uses 5000TON of forging pressure versus the other manufacturers using 8000-10000TON in the same 3-stage process? FYI, all die-forged wheels are built using a 3-stage forging process.

BBS wheels are great, but I applaud BBS-Germany for their success and innovation and feel a terrible shame about BBS-Japan releasing biased and mis-informative articles to get their company out of bankruptcy.
great response....
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