Kosei K1 Wheels -- Beware!

Jeff@TopGearSolutions · 07-15-2010, 10:57 PM

Wow...

this is pretty serious.

I dont care if these are "disposable wheels" to some track guru's this is not for me.

I'll pay the extra money next time around to avoid a possible disaster.

Nobody wants to live in fear driving on at 80 MPH highway or track to find your wheels crack and just fall off (not that these fell off, but they could have).

ar design · 07-15-2010, 11:21 PM

One pic has 5x100, another 5x114, and another 5x120 in your pics.... All off your car?

Mr. 5 · 07-15-2010, 11:34 PM

Quote:

Originally Posted by ar design

One pic has 5x100, another 5x114, and another 5x120 in your pics.... All off your car?

Yah, I think those are all the options.
They're different spokes.

jayhudson · 07-16-2010, 09:57 AM

Just as a follow-up........ it had occurred to me that the cracks could have been caused by tire installation(s). IMO those types of cracks would be caused more from side loading than hitting bumps.

Even though my situation was a race car with sticky tires and plenty of side load stresses I know many others, including cone-punters who are often up on 2 wheels, who don't have the problem of craked spokes. Bent wheels from hitting berms, etc., but not cracked spokes. Something to ponder.

Jay

Penguino · 07-16-2010, 11:12 AM

This seems to be the problem. The load rating on the wheels are very dangerous for a BMW application. Why every spoke has a different bolt pattern and load rating is beyond me. A wheel with a load rating of 505kg should not be on a BMW.

Under track conditions the wheels experience greater loads than daily street driving. Very glad the wheels did not collapse while driving.

Load rating shows: 690kg

Load rating shows: 650kg

Load rating shows: 505kg

Mr. 5 · 07-16-2010, 12:03 PM

Quote:

Originally Posted by carlitosz

This seems to be the problem. The load rating on the wheels are very dangerous for a BMW application. Why every spoke has a different bolt pattern and load rating is beyond me. A wheel with a load rating of 505kg should not be on a BMW.

Under track conditions the wheels experience greater loads than daily street driving. Very glad the wheels did not collapse while driving.

Like I said previously, I believe that those are all of the options that they offer for that type of wheel. Obviously, I can't have all of those bolt patterns on one wheel. The correct load for the 5x120 application is displayed right next to it on that spoke.

It says that the load capacity for the 5x120 wheel is 650 kg as seen in this picture.

forza1976 · 07-16-2010, 03:11 PM

Man 5... Glad you didn't have a bad failure. That would have been scary. Go buy some Enkei RPF1's, they are light too. I haven't had any issues with mine and had a couple track days and lots of street driving.

Hedges · 07-16-2010, 03:15 PM

Mr 5, Glad you are safe man! That is extremely dangerous and thank your lucky charms you were ok man!

RoundelM3 · 07-18-2010, 04:01 PM

To paraphrase Inspector Harry Callahan, "a man's got to know his wheels' limitations!"

Glad that you didn't have a mishap due to the broken wheels, and thanks for bringing this to everyone's attention. As heavy as our cars are, it's probably no surprise that the extreme loading from tracking the car went beyond the wheels' limits.

Mr. 5 · 07-26-2010, 01:12 PM

Just to update, the front wheels are fine.
No cracks were found in the front with a detailed inspection.

MKE_M3 · 07-27-2010, 06:18 AM

I think they are meant for much lighter cars, in general.

Blue Liquid · 07-27-2010, 07:50 AM

Quote:

Originally Posted by Mr. 5

Obviously, I can't have all of those bolt patterns on one wheel. The correct load for the 5x120 application is displayed right next to it on that spoke.

It says that the load capacity for the 5x120 wheel is 650 kg as seen in this picture.

Well said. I checked out my wheels last night just in case, even though they aren't Kosei. Last thing I need is a broken wheel.

grayshadow.e92 · 07-27-2010, 01:48 PM

Can it be different load ratings for different bolt patterns?

Quote:

Originally Posted by carlitosz

This seems to be the problem. The load rating on the wheels are very dangerous for a BMW application. Why every spoke has a different bolt pattern and load rating is beyond me. A wheel with a load rating of 505kg should not be on a BMW.

Under track conditions the wheels experience greater loads than daily street driving. Very glad the wheels did not collapse while driving.

Load rating shows: 690kg

Load rating shows: 650kg

Load rating shows: 505kg

catch · 07-27-2010, 04:16 PM

wow!! sorry to see this! crazy!
I dont care if they advertise these as "track" wheels, the reality is if they cant be driven on without cracking their factory should be shut down!

Clap135 · 08-04-2010, 10:09 AM

Glad u caught before it turned ugly. Its a little weird how u let it get to that point.....don't you wash your wheels weekly?

BTW the term cone punters had me rolling lmao

GeorgeSmooth · 09-03-2010, 02:41 PM

Did you contact the vendor that sold them to you?
Are you still using the same brand?

Bowser330 · 01-21-2011, 11:23 AM

so its 650kg per 5X120 wheel...650kg * 2.2 = 1430lbs per wheel

1430 * 4 wheels = 5,720lbs (E92 weighs in at about 3600lbs)

So should the load rating of the wheel be 1/2 of the overall weight? so two wheels can support the entire weight of the car?

So for E92 needs wheels with load ratings of 1800lbs (818kgs)??

BANKAI · 03-09-2014, 06:47 AM

Not to be inconsiderate, but if you're running 17x8.5 +40 and want to get rid of 1, I cracked one of mine recently and would be in the market to purchase one of your "good" ones. I would be running it on my e36 3050lbs car so I'm not as worried.

JC335xi · 03-09-2014, 08:30 AM

Quote:

Originally Posted by BANKAI

Not to be inconsiderate, but if you're running 17x8.5 +40 and want to get rid of 1, I cracked one of mine recently and would be in the market to purchase one of your "good" ones. I would be running it on my e36 3050lbs car so I'm not as worried.

Dude, this thread is over 3 years old.... lol

BANKAI · 03-09-2014, 05:22 PM

Quote:

Originally Posted by JC335xi

Dude, this thread is over 3 years old.... lol

LOL ooops

07-15-2010, 10:57 PM	#23
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Wow... this is pretty serious. I dont care if these are "disposable wheels" to some track guru's this is not for me. I'll pay the extra money next time around to avoid a possible disaster. Nobody wants to live in fear driving on at 80 MPH highway or track to find your wheels crack and just fall off (not that these fell off, but they could have).
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07-15-2010, 11:21 PM	#24
ar design 297 Rep 4,408 Posts Drives: 04 M3 Join Date: Jan 2008 Location: Denver, CO iTrader: (9)	One pic has 5x100, another 5x114, and another 5x120 in your pics.... All off your car?
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07-16-2010, 09:57 AM	#26
jayhudson Ex-CCA racer 3 Rep 183 Posts Drives: '08 328i Join Date: Jul 2009 Location: Grants Pass, OR iTrader: (0)	Just as a follow-up........ it had occurred to me that the cracks could have been caused by tire installation(s). IMO those types of cracks would be caused more from side loading than hitting bumps. Even though my situation was a race car with sticky tires and plenty of side load stresses I know many others, including cone-punters who are often up on 2 wheels, who don't have the problem of craked spokes. Bent wheels from hitting berms, etc., but not cracked spokes. Something to ponder. Jay __________________
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07-16-2010, 11:12 AM	#27
Penguino Lieutenant Colonel 1613 Rep 1,608 Posts Drives: A car. Join Date: Dec 2009 Location: Here iTrader: (5)	This seems to be the problem. The load rating on the wheels are very dangerous for a BMW application. Why every spoke has a different bolt pattern and load rating is beyond me. A wheel with a load rating of 505kg should not be on a BMW. Under track conditions the wheels experience greater loads than daily street driving. Very glad the wheels did not collapse while driving. Load rating shows: 690kg Load rating shows: 650kg Load rating shows: 505kg __________________ "Beware of false knowledge; it is more dangerous than ignorance."
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07-16-2010, 03:11 PM	#29
forza1976 Major General 3399 Rep 6,591 Posts Drives: BMW Join Date: Aug 2007 Location: 49417 and 60610 iTrader: (13) Garage List 2022 BMW M3X [10.00]	Man 5... Glad you didn't have a bad failure. That would have been scary. Go buy some Enkei RPF1's, they are light too. I haven't had any issues with mine and had a couple track days and lots of street driving.
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07-16-2010, 03:15 PM	#30
Hedges Major General 116 Rep 5,178 Posts Drives: 12 C63 AMG Join Date: Jul 2008 Location: Toronto iTrader: (8)	Mr 5, Glad you are safe man! That is extremely dangerous and thank your lucky charms you were ok man!
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07-18-2010, 04:01 PM	#31
RoundelM3 Major General 1837 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	To paraphrase Inspector Harry Callahan, "a man's got to know his wheels' limitations!" Glad that you didn't have a mishap due to the broken wheels, and thanks for bringing this to everyone's attention. As heavy as our cars are, it's probably no surprise that the extreme loading from tracking the car went beyond the wheels' limits. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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07-26-2010, 01:12 PM	#32
Mr. 5 Modder Raider 756 Rep 8,633 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [8.00]	Just to update, the front wheels are fine. No cracks were found in the front with a detailed inspection. __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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07-27-2010, 06:18 AM	#33
MKE_M3 Lieutenant Colonel 65 Rep 1,705 Posts Drives: 2011 e90 M3 Join Date: Feb 2009 Location: Milwaukee, WI iTrader: (0)	I think they are meant for much lighter cars, in general.
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07-27-2010, 04:16 PM	#36
catch Major General 669 Rep 7,148 Posts Drives: F80 M3 Join Date: Jan 2009 Location: Thornhill iTrader: (27)	wow!! sorry to see this! crazy! I dont care if they advertise these as "track" wheels, the reality is if they cant be driven on without cracking their factory should be shut down! __________________ 2016 F80 M3 Mineral White/Sakhir Orange 2013 BMW S1000RR Flat Silver <stolen> 2007 BMW E92 335i Jet Black/Jade Grey <sold>
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08-04-2010, 10:09 AM	#37
Clap135 Brigadier General 103 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	Glad u caught before it turned ugly. Its a little weird how u let it get to that point.....don't you wash your wheels weekly? BTW the term cone punters had me rolling lmao
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09-03-2010, 02:41 PM	#38
GeorgeSmooth Lieutenant 38 Rep 565 Posts Drives: 2008 E90 335i AT Join Date: Feb 2008 Location: South Africa iTrader: (0)	Did you contact the vendor that sold them to you? Are you still using the same brand? __________________ 08 E90 335i AT RB Turbos -NX Wet Kit - Chiplogic Flash or Procede V5- M3 Diff - AE Exhaust- Forge Dv's - Helix Intercooler - AR DP's - P3 Boost Gauge - Vishnu Meth- Stett Chargepipe and CAI 09 C63
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01-21-2011, 11:23 AM	#39
Bowser330 Lieutenant Colonel 289 Rep 1,575 Posts Drives: i3 REX Join Date: Jan 2011 Location: Socal iTrader: (0)	so its 650kg per 5X120 wheel...650kg * 2.2 = 1430lbs per wheel 1430 * 4 wheels = 5,720lbs (E92 weighs in at about 3600lbs) So should the load rating of the wheel be 1/2 of the overall weight? so two wheels can support the entire weight of the car? So for E92 needs wheels with load ratings of 1800lbs (818kgs)??
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03-09-2014, 06:47 AM	#40
BANKAI Private First Class 7 Rep 108 Posts Drives: 335i Join Date: Jul 2011 Location: Los Angeles, CA iTrader: (0)	Not to be inconsiderate, but if you're running 17x8.5 +40 and want to get rid of 1, I cracked one of mine recently and would be in the market to purchase one of your "good" ones. I would be running it on my e36 3050lbs car so I'm not as worried.
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