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W203/CL203 Aftermarket Wheel Thread - All you want to know
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The rule of thumb is a minimum of 6 full threads. Don't know what that is in mm. Too far on the rear will foul the parking brake mechanism.
Last edited by Glyn M Ruck; Aug 29, 2009 at 07:08 PM.
Junior Member
Joined: Mar 2007
Posts: 19
Likes: 0
Sorry I didn't clarify, but I currently have the C7 wheels on my w203.
I took the rims off and measured 17mm from the hub of the rim to the end of the bolt shank. But if 6 full threads is what is rule of them, then I will follow.
I took the rims off and measured 17mm from the hub of the rim to the end of the bolt shank. But if 6 full threads is what is rule of them, then I will follow.
Super Member
Joined: May 2009
Posts: 904
Likes: 22
From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
Are you using your stock lug bolts? On stock C7 wheels? 17mm into the hub is a bit longer than I recall. 
Mercedes C-class (W203) stock lug bolts for OEM alloy wheels:
M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex
On basically all Mercedes with stock wheels (and stock lug bolts),... you need to turn bolt for about 6 rotations to get the suggested 80 ft lb torque. This is a handy rule if you need to mount the wheels but don't have a torque wrench around.
Since the threads are M12x1.5,... 6 rotations is about 9mm,... add the 2-3mm tip of the bolt that just guides it in,... and you have about 11-12mm of the lug bolt that should go into the hub. Of course a bit more is better than a bit less!
Is your 17mm into the hub too much? Just measure how much deep you can go into the hub without hitting the rear parking brake mechanism. Most likely not a problem.
Mercedes C-class (W203) stock lug bolts for OEM alloy wheels:
M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex
On basically all Mercedes with stock wheels (and stock lug bolts),... you need to turn bolt for about 6 rotations to get the suggested 80 ft lb torque. This is a handy rule if you need to mount the wheels but don't have a torque wrench around.
Since the threads are M12x1.5,... 6 rotations is about 9mm,... add the 2-3mm tip of the bolt that just guides it in,... and you have about 11-12mm of the lug bolt that should go into the hub. Of course a bit more is better than a bit less! Is your 17mm into the hub too much? Just measure how much deep you can go into the hub without hitting the rear parking brake mechanism. Most likely not a problem.
Junior Member
Joined: Aug 2009
Posts: 18
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2002 c32
I got the wheels on and no tire rubbing with 3 people in car. Just like you stated, got the 5mm spacer with bolts to clear caliper. Front wheels did fit without the spacer but they where extremely close to calipers. Now i'll work on replacing those ugly frosted headlights. Thanks Frank.
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Super Member
Joined: Feb 2008
Posts: 627
Likes: 0
From: Los Angeles
2011 C63 AMG
Hey all I am looking for some 18's for my coupe, saw these on the forum in the classified section. Wanted to know what people thought and to double check fitment for my coupe. From what I understand is that these will fit on my coupe, but can I use stock lug nuts from my 16's?
Link to thread with add:
https://mbworld.org/forums/wheels-ti...50-so-cal.html
Thanks
Sam
Link to thread with add:
https://mbworld.org/forums/wheels-ti...50-so-cal.html
Thanks
Sam
Junior Member
Joined: Mar 2007
Posts: 19
Likes: 0
so i just put on my rims and of course, there was clicking from the parking brake...17mm into the hub is too long
im going to go back to using my 26mm shank bolts to knock off 4mm.
i hope 13mm isn't too long still to go into the hub.
god i hope i didn't ruin the parking brake mechanism...i rolled about 1/4 and babied it back home.
im going to go back to using my 26mm shank bolts to knock off 4mm.
i hope 13mm isn't too long still to go into the hub.
god i hope i didn't ruin the parking brake mechanism...i rolled about 1/4 and babied it back home.
Super Member
Joined: May 2009
Posts: 904
Likes: 22
From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
13mm into hub should be fine,... normally its about 11-12mm into hub.
I'm a bit confused,... you're using factory C7 wheels, right? That's the C-class Evolution package wheels with 7 spokes. I'm under the impression all C-class (w203) stock alloy wheels uses lug bolts with M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex. Thus I'm wondering where you get lug bolt with 26mm shank from?
You're saying the 17mm into hub is from lug bolt with 30mm shank? Are you sure you're measuring shank correctly from the base of the ball seat to the threaded end of the bolt? Are you sure you're using Mercedes-Benz factory C7 alloy wheels?
Where are you getting these lug bolts from?
I'm a bit confused,... you're using factory C7 wheels, right? That's the C-class Evolution package wheels with 7 spokes. I'm under the impression all C-class (w203) stock alloy wheels uses lug bolts with M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex. Thus I'm wondering where you get lug bolt with 26mm shank from?
You're saying the 17mm into hub is from lug bolt with 30mm shank? Are you sure you're measuring shank correctly from the base of the ball seat to the threaded end of the bolt? Are you sure you're using Mercedes-Benz factory C7 alloy wheels?
Where are you getting these lug bolts from?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Your parking brake mechanism should be OK. It's when you lock everything up solid & try & drive that it creates mayhem.
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
13mm into hub should be fine,... normally its about 11-12mm into hub.
I'm a bit confused,... you're using factory C7 wheels, right? That's the C-class Evolution package wheels with 7 spokes. I'm under the impression all C-class (w203) stock alloy wheels uses lug bolts with M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex. Thus I'm wondering where you get lug bolt with 26mm shank from?
You're saying the 17mm into hub is from lug bolt with 30mm shank? Are you sure you're measuring shank correctly from the base of the ball seat to the threaded end of the bolt? Are you sure you're using Mercedes-Benz factory C7 alloy wheels?
Where are you getting these lug bolts from?
I'm a bit confused,... you're using factory C7 wheels, right? That's the C-class Evolution package wheels with 7 spokes. I'm under the impression all C-class (w203) stock alloy wheels uses lug bolts with M12x1.5 thread, R12 ball seat, 39.9 mm shank, 17 mm Hex. Thus I'm wondering where you get lug bolt with 26mm shank from?
You're saying the 17mm into hub is from lug bolt with 30mm shank? Are you sure you're measuring shank correctly from the base of the ball seat to the threaded end of the bolt? Are you sure you're using Mercedes-Benz factory C7 alloy wheels?
Where are you getting these lug bolts from?
all W203 wheels including AMG wheels for W203 shouldn't require any different bolts.
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
Hey all I am looking for some 18's for my coupe, saw these on the forum in the classified section. Wanted to know what people thought and to double check fitment for my coupe. From what I understand is that these will fit on my coupe, but can I use stock lug nuts from my 16's?
Link to thread with add:
https://mbworld.org/forums/wheels-ti...50-so-cal.html
Thanks
Sam
Link to thread with add:
https://mbworld.org/forums/wheels-ti...50-so-cal.html
Thanks
Sam
Junior Member
Joined: Mar 2007
Posts: 19
Likes: 0
Sorry for not clarifying but I had the C7 rims (7 spoke) with the ball seat lug bolts with about 39mm shank (base of ball seat to end of thread). The ball seated bolts extended more than 17mm from the back of the rim to the end of thread.
The rims I just slapped on are the LC Lemans. I bought 30mm shank RAD bolts and they stick out about 17mm from the back of the rim to the end of the thread.
I don't know why the OEM ball seat didn't click when the lug bolts stuck out further from behind the rim then the set up I have currently.
I'm going to try popping on the 26mm shank bolts that I also have on the LC Lemans to see if the clicking goes away but it is barely 6 threads into the hub (if that).
The rims I just slapped on are the LC Lemans. I bought 30mm shank RAD bolts and they stick out about 17mm from the back of the rim to the end of the thread.
I don't know why the OEM ball seat didn't click when the lug bolts stuck out further from behind the rim then the set up I have currently.
I'm going to try popping on the 26mm shank bolts that I also have on the LC Lemans to see if the clicking goes away but it is barely 6 threads into the hub (if that).
Super Member
Joined: May 2009
Posts: 904
Likes: 22
From: Toronto, Ontario, Canada, eh!
2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather
That so called clicking might not be from the lug bolts going too deep into the hub and hitting the parking brake.
Are you sure those LC Lemans have ball seated wheel holes??? Most aftermarket wheels are cone seated wheel holes! Make sure the seat on the wheel holes and those on your lug bolts matches,... and if they got *****
,... make sure they're the right size (R12, R13, R14).
Are you sure those LC Lemans have ball seated wheel holes??? Most aftermarket wheels are cone seated wheel holes! Make sure the seat on the wheel holes and those on your lug bolts matches,... and if they got *****
,... make sure they're the right size (R12, R13, R14).
Junior Member
Joined: Mar 2007
Posts: 19
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That's the first thing i took into mind when I got the rims, if they were ball or cone. The LC Lemans are cone seated so I got these below:
RAD Lug Bolt 12mmx1.5, 26mm Shank, Cone Seat, 17mm Hex
What I don't understand is how come there wasn't any clicking with the C7 rims when the bolts extended about 18-19mm from behind the rim. I hope I didn't eff anything up...
RAD Lug Bolt 12mmx1.5, 26mm Shank, Cone Seat, 17mm Hex
What I don't understand is how come there wasn't any clicking with the C7 rims when the bolts extended about 18-19mm from behind the rim. I hope I didn't eff anything up...
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
So your offset is now approx 30 - which is ideal for these cars?
Junior Member
Joined: Mar 2007
Posts: 19
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Yes, I'm running 5mm spacers and yes i have 6 full threads. I might even try the 28mm shank bolts just to get a bit more thread.
FOR SALE: RAD Lug Bolt 12mmx1.5, 30mm Shank, Cone Seat, 17mm Hex
- Mounted and rolled on 1/4 and asking for only $40 shipped.
FOR SALE: RAD Lug Bolt 12mmx1.5, 30mm Shank, Cone Seat, 17mm Hex
- Mounted and rolled on 1/4 and asking for only $40 shipped.
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,122
Likes: 222
From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
This seems like my kind of thread: very tolerant of noobish questions, like the one I'm about to ask!
I can't take it anymore; my wife has ruined more wheels and tires on Boston's potholed roads than I can count, so I'm looking for some 16" MB wheels to replace the 17" "Sport" wheels she currently has.
This set claims to fit S class 92 or newer, and lists Width as 7.5J and Bolt Pattern as 5x112 (no offset given). Does that tell us enough to determine whether they'll fit my 2003 C-class sedan without any issues?
I can't take it anymore; my wife has ruined more wheels and tires on Boston's potholed roads than I can count, so I'm looking for some 16" MB wheels to replace the 17" "Sport" wheels she currently has.
This set claims to fit S class 92 or newer, and lists Width as 7.5J and Bolt Pattern as 5x112 (no offset given). Does that tell us enough to determine whether they'll fit my 2003 C-class sedan without any issues?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
OK - that's why everyone was getting confused here. They first did not understand which wheels you had & you omitted to mention spacers.
