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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > Kosei K1's???



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      05-12-2010, 08:57 AM   #1
bklynbimmer
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Question Kosei K1's???

I am about to pull the trigger and order my self a set of track wheels and tires!

I am probably gonna go with the Kosei K1s 17"x8.5"

Has anyone had any issues or can give me some solid advice???

Thanks
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      05-12-2010, 09:32 AM   #2
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I ran them on my E36 M3 as track wheels and had no issues at all. Cheap and lightweight -- the perfect track wheel. However, had they been out at the time I would have gotten D-force wheels instead.
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      05-12-2010, 09:33 AM   #3
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Originally Posted by bklynbimmer View Post
I am about to pull the trigger and order my self a set of track wheels and tires!

I am probably gonna go with the Kosei K1s 17"x8.5"

Has anyone had any issues or can give me some solid advice???

Thanks
Great choice!

Note that your tire will be closer to the front strut due to the offset (ET40) and larger rim size . If you are running stock struts in front you should have no rubbing problem, if the tire size is 255/245 or less. If you have coilovers, you might need spacers if you are running larger than 225 tires.
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      05-13-2010, 10:10 AM   #4
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I got them on my car..but I dont think they will fit yours... :-)

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      05-13-2010, 10:45 AM   #5
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I've got a set and have been running them for about a year and a half with no issues.
The lack of center hubs gives the car a bit of a hardcore look that works just fine for me.
Dan
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      05-13-2010, 11:52 AM   #6
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2007 e90 335i  [4.00]
I love them. I run them all the time now.
http://www.e90post.com/forums/showthread.php?t=385104
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      05-13-2010, 10:45 PM   #7
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I've got a set and have been running them for about a year and a half with no issues.
The lack of center hubs gives the car a bit of a hardcore look that works just fine for me.
Dan
Guess what? You can hammer in the BMW center caps and they hold just fine! Take them out when on the track.
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      05-13-2010, 10:47 PM   #8
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I love them. I run them all the time now.
http://www.e90post.com/forums/showthread.php?t=385104
I have one set of Kosei K-1 with Dulop Direzza star spec 245 17 square for daily driving and another set with BFG R1 255 17 square for the track.
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      05-14-2010, 06:25 AM   #9
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Thanks everyone....just placed the order! Kosei's with 245 Direzzas all around!

Next track day is the 25th of June, cant wait!!!
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      05-14-2010, 09:36 AM   #10
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Guess what? You can hammer in the BMW center caps and they hold just fine! Take them out when on the track.
Cool. Thx!
d
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      05-14-2010, 09:52 AM   #11
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Koseis with 255 Direzzas all the way around. LOVE IT!
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      05-18-2010, 11:20 AM   #12
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Koseis with 255 Direzzas all the way around. LOVE IT!
I'm in the same situation, was thinking of buying 245 sq. Are we saying that 255 fronts won't rub? (on a e92 stock)
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      05-18-2010, 08:53 PM   #13
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I'm in the same situation, was thinking of buying 245 sq. Are we saying that 255 fronts won't rub? (on a e92 stock)
Personally I have an E90, but I know that E92 can run the same size up front with street tires. I know that once you go to R compounds they run bigger and have the chance of rubbing the fenders.
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      05-19-2010, 01:26 AM   #14
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Thanks everyone....just placed the order! Kosei's with 245 Direzzas all around!

Next track day is the 25th of June, cant wait!!!
A friend of mine shattered TWO...One of them the spoke broke clean off on a smooth on-ramp and another running over a small-ish berm on the track.

They're lightweight. They're cheap. They're great track rims. Just don't expect them to last like heavier cast wheels or equivalent forged wheels...And treat them as expendable parts and replace every couple of seasons and you'll be fine.
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