





W203/CL203 Aftermarket Wheel Thread - All you want to know

Setup:
2 front 18X8.5 (225/40/18)
2 rear 18X9.5 (255/35/18)





Setup:
2 front 18X8.5 (225/40/18)
2 rear 18X9.5 (255/35/18)
Do you know what the offset of the wheel is?
are you rubbing here?
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or here?
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Last edited by W203E35; Jul 24, 2009 at 05:52 PM.
Can anyone else chime in?
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If it is rubbing here (look below) then you need to roll the fenders.
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(where the red slash is that's where it's rubbing)
225/45r17
245/40r17
Any expert advice will be appreciated!
The Best of Mercedes & AMG
225/45r17
245/40r17
Any expert advice will be appreciated!
I would suggest just sell them and get something that fit better.

Setup:
2 front 18X8.5 (225/40/18)
2 rear 18X9.5 (255/35/18)
who the hell bangs on the inner wheel well? get spacers, fix the camber, or get different wheels.
who the hell bangs on the inner wheel well? get spacers, fix the camber, or get different wheels.
I am runnnig the same offsets with my 18x8 and 18x9.5's and am clearing coilover perch.
225/45r17
245/40r17
Any expert advice will be appreciated!

Mercedes C-class (W203) have two bolt sizes:
-long- M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex (for OEM alloy wheels)
-short- M12x1.5 thread, R12 ball seat, 20.6 mm shank (for winter "steelies")
Mercedes W204 (2009 C class) uses:
M14x1.5 thread, R13 ball seat, 26.7mm shank, 17mm hex
In addition to what FrankW says about shorter bolt size and different thread,... the ball seat are different as well. W203 have R12 ball seat which have 12mm radius like an American quarter. W204 have R13 ball seat which have 13mm radius like those odd US dollar coin (with indian woman and child) that nobody uses. If you use bolts with R12 ball seat on wheels requiring R13 ball seat, the bolts ball seat will be too small for the ball seat area of the wheel and will not hold your wheels properly. You can get wheel vibration at high speed and hard cornering and eventually bolts breaking off.
Your ideal bolt would be:
M12x1.5 thread (to fit your W203), R13 ball seat (to fit your 17" OEM wheel/tires from a 2009 C300 4 matic sport), shank size would be about 26.7mm plus spacer thickness (but do confirm that length of threaded end of new bolt sticking out of wheel & spacer is same length of threaded end of old bolt sticking out of W203 wheels).
This thread might have some more info for you:
https://mbworld.org/forums/c-class-w...55-wheels.html
If you are still trying to figure out where spacer thickness numbers come from, look at your offsets:
http://www.mercedeswheels.net/
http://www.alloywheelsdirect.net/inf.../mercedes-benz
Local pick up only I won't ship. I'm in upstate NY.
Local pick up only I won't ship. I'm in upstate NY.
its funny how ur first post is a thread and ur thread is something u wanna sell lmao.
but neways y do u want to sell them?





