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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > Both front Kosei K1s cracked



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      02-05-2012, 04:31 PM   #1
mid-corner fun
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Both front Kosei K1s cracked

While prepping for the new season I found cracks on both front K1s (2 on left one, 1 on right, all on inside lip). ~40 track days on these, about half with current tires. Rears are both fine.

I check wheels before every event, this is definitely a new development. The only scenario I can think off for the cracks was a very rough transition between infield and banked straights on my last event. There was an actual gap of a few inches upsetting balance on every transition.

Check your wheels, better safe than sorry!



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      02-05-2012, 04:53 PM   #2
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man that sucks. sorry to see that.
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      02-05-2012, 05:02 PM   #3
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Sorry Pete. That does suck. I will say, 40 track days is decent. I would guess that the average person does 5-6 a year. You must've been out there A LOT!
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      02-05-2012, 05:15 PM   #4
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Originally Posted by dsbj View Post
Sorry Pete. That does suck. I will say, 40 track days is decent. I would guess that the average person does 5-6 a year. You must've been out there A LOT!
lol, I didn't say that was in one season. I think this is over 2 and a half seasons, I shoot for ~15 track days per year.

Unless I quit my job, I don't see me squeezing in more track days per year
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      02-05-2012, 05:44 PM   #5
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Originally Posted by PeterM1 View Post
lol, I didn't say that was in one season. I think this is over 2 and a half seasons, I shoot for ~15 track days per year.

Unless I quit my job, I don't see me squeezing in more track days per year
Fine. 15 a year is still a lot. Lol.

For as much as you track your car, I say you pick up a BRZ and beat the snot out of that. That's what I'm planning. Retire the 335i from the track.

Last edited by dbjb; 02-05-2012 at 06:40 PM.
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      02-09-2012, 02:00 PM   #6
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40 track day is beast...

so what are you getting next? same Kosei's?
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      02-14-2012, 04:44 PM   #7
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I have seen the front wheels on a set of Kosei K1's during a race have the center of the wheel separator from the barrel while in the carousal at Road America.
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      02-14-2012, 08:44 PM   #8
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Sorry for OP. Glad I went with Apex ARC 8s
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      02-14-2012, 08:50 PM   #9
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I broke 6 sets on my E36 so dont feel bad lol. I switched to apex arc8
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      02-14-2012, 08:59 PM   #10
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I broke 6 sets on my E36 so dont feel bad lol. I switched to apex arc8
I've heard great things about Enkei Wheels
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      02-14-2012, 09:14 PM   #11
mid-corner fun
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No choice, I ordered 2 K1s for now. If the stars align I'll be running 18" arc8s next year with much wider tires on a different car
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      02-14-2012, 11:39 PM   #12
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much wider tires on a different car
m6 group buy!?
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      02-18-2012, 10:57 PM   #13
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Wheels are a wear item. They will all break in time with track use. Good looking out.
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