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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 02-11-2012, 07:21 PM   #1
DarkJoker
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My Ride: 01 330ci
Wheel studs and spacers ??

So ive searched around the boards and cant exactly find all the info im looking for.

So ill make a thread with questions.

my setup is as follows

Hks hypermax coils
hotchkis sways
bmw performance strut tower bar
meyle hd fcab
vorschlag poly engine and trans mounts
powerflex rear subframe mounts

front camber factory spec
toe ill adjust to an alignment thread ive found on here

rear is factory camber adjustments as well
oem arms

wheels kosei k1 17x8.5 et 40 all 4
with my old 235/xx/17 tire on the front im using a 5mm to clear the coil overs and it just clears

My new tires are nitto nt-05 255/40/17 for all 4 corners mounted to the kosei's (not yet)

I have a hunch without trial fit this will not be enough.

So my intended plan is to convert to studs be it 75 mm or longer
and also run a spacer.

This is where the problem i think arises.
What size spacer 10 mm 12mm 15 mm ?
Every spacer ive run across tms bimmerworld re etc are all hub-centric and are not reccomended with kosei's.

So the question is can i doublestack/triple stack a mixture of spacers 3mm 5mm 7mm all the ones that are not hubcentric to attain said space i need safely on wheel studs?

My inner self says yes, but im not a pro,engineer or quantum physicist that are trained in metal shearing or stress loads and such.

Any help and information is greatly appreciated.

Thanks
Colin
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Old 02-12-2012, 07:08 PM   #2
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You can stack spacers but you need to extend the hub. Not sure why you can't use 12mm spacers with Kosei wheels.

With 75mm studs, you can run 12mm spacers. 15mm is really pushing it...I wouldn't do it.
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Old 02-12-2012, 07:13 PM   #3
DarkJoker
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every wheel spacer ive run across on the vendors pages and non vendors always mentions against running them with kosei's due to the chamfer on the wheel and it not seating squared up and proper with the hubcentric spacer
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Old 02-12-2012, 07:14 PM   #4
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im thinking with studs it really wont matter if i double up
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Old 02-13-2012, 12:47 AM   #5
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Quote:
Originally Posted by DarkJoker View Post
im thinking with studs it really wont matter if i double up
Take a pic of the back of the wheel. Is it squared or really rounded on the inside?

If you add more than 5mm of spacers you really need to extend the hub. Your studs won't last long if there is little or no hub sticking out. Not only will you likely get really bad vibrations but your wheel might fall off.
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Old 02-13-2012, 07:15 PM   #6
DarkJoker
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see thats the kind of logic im looking for

i wanted to get all this done in one shot and order before i get my tires on thursday

but ive come to the conclusion of just mounting the tire then doing test fits and go from there

i appreciate the input

the back of the wheel is along the lines of this(not exact wheel pictured)


also just found out that rouge offers a flat 10mm spacer without a hub centric portion
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Old 02-13-2012, 07:49 PM   #7
DarkJoker
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while looking for that picture i found an answer from a picture on the other forum

http://forums.bimmerforums.com/forum....php?t=1102483

damn that sucked to find ill have to use a picture search in the future to find things now as well
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Old 02-13-2012, 09:08 PM   #8
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The joint between the hub ring and the flat surface is not a 90 degree angle so your wheel does need to be chamfered on the back to properly sit against the spacer.

Most spacers are a little concave at that joint instead of being a clean right angle. Which would explain with the TMS 10mm spacer and hub extender works in this case.
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Old 03-03-2012, 06:20 PM   #9
DarkJoker
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i ended up using the vac motorsport 8mm spacer and hub extender to make the front wheels clear the coilovers

studs are on backorder through bimmerworld at the moment

wheels clear at full lock both ways and i experience a minor rub over big dips

overall no big issues
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