C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Will they fit

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 01-17-2017, 07:52 PM
  #1  
MBWorld Fanatic!
Thread Starter
 
Adi-Benz's Avatar
 
Join Date: Apr 2016
Location: Milwaukee, WI
Posts: 4,695
Received 547 Likes on 483 Posts
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Will they fit

Will they fit
Will it stick out too far?
Will my spedo need recalib?

18x8
18x9 I guess? maybe 9.5? unclear :S

245/40/R18
275/35/R18
and/or
225/40/R18
265/35/R18

I guess I'm leaning towards the 265's.

Thank you for those who help in advance.
Old 01-17-2017, 09:35 PM
  #2  
MBWorld Fanatic!
 
MB Marko's Avatar
 
Join Date: Apr 2015
Location: London ON Canada
Posts: 1,739
Received 118 Likes on 109 Posts
2012 C300 4Matic Sport Sedan
whats the offset? is the main question.

no need for speed recalibration, they do that if you put on a major difference in sizing.

225/40/R18 will fit I'm running those on the front i can't remember what my rears are but I'm pretty sure there 265/35/R18 i can confirm tomorrow.

check the manual it says what the optimal tire size is for 17's and 18's

also I'm running
18x8.5
18x9.5
summer for my summer wheels

Last edited by MB Marko; 01-17-2017 at 09:38 PM.
Old 01-18-2017, 09:03 AM
  #3  
MBWorld Fanatic!
Thread Starter
 
Adi-Benz's Avatar
 
Join Date: Apr 2016
Location: Milwaukee, WI
Posts: 4,695
Received 547 Likes on 483 Posts
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
+40 for both I think? Man this website is lacking details.

pm sent

main goal of course is they dont stick out of fenders

Last edited by Adi-Benz; 01-18-2017 at 09:14 AM.
Old 01-18-2017, 10:27 AM
  #4  
Junior Member
 
mykthex's Avatar
 
Join Date: Aug 2016
Posts: 50
Received 2 Likes on 2 Posts
2013 C350 Coupe
Originally Posted by Adi-Benz
+40 for both I think? Man this website is lacking details.

pm sent

main goal of course is they dont stick out of fenders
If you go with 8.5 for the front and 9.5 for the rear, don't go with more than ET45 for the offset or they will stick out of the fenders.

My next set of wheels will be:

Front: 8.5" ET45 with 225/40/R18
Rear: 9.5" ET45 with 255/35/R18
Old 01-18-2017, 11:47 AM
  #5  
Junior Member
 
pozi240's Avatar
 
Join Date: Jan 2016
Location: Ottawa, ON
Posts: 47
Received 5 Likes on 5 Posts
2012 C350 4Matic Sport
"Fitting" isn't really the major issue to ask yourself here, but, the rolling diameter difference from front to back since your car is a 4matic.
The factory 18" staggered setup for a 4matic (have it on my car OEM) is 225/40/18 front, 255/35/18 rear. With this setup, the difference front/rear is only .4% (804 revs per mile vs 806 revs/mile).
Your proposed setup of 245/4018 fr/ 275/35/18 rr is good as it also only .4% off (785 revs/mile vs 789 revs/mile), however, the tires are taller, so, your speedo will be off. The second setup (225/40/18 fr/ 265/35/18 rr) isn't too bad either but it is .8% difference (804 revs/mile vs 797 revs/mile). This setup would be better for speedo and front fender clearance.
I personally would still stick with the OEM sizes given the sensitivity of the M-B transfer case in these cars. The information I was given by several Mercedes sources, dealer techs and a trusted independent M-B tech was "as long as the rolling diameter front to back is within 1% of each other, there is no excess wear in the transfer case".... of course, YMMV.
Cheers,
Old 01-18-2017, 12:58 PM
  #6  
MBWorld Fanatic!
Thread Starter
 
Adi-Benz's Avatar
 
Join Date: Apr 2016
Location: Milwaukee, WI
Posts: 4,695
Received 547 Likes on 483 Posts
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Thanks for the info. There's a lot of questions I couldn't cover so thanks for getting a bit more into it.

Plan on going 265's instead of 275, 75's are too big. 255's aren't an option with the wheel choice so I suppose they won't work :S

This transfer case stuff is such a joke you would think a big german company like Mercedes would know how to make something solid by now. What can you expect I guess. So .4% and .8% being said then either will work because they are <1%? Which would you guys suggest be the better option? I didn't think the 265's would be so far off at .8%

Last edited by Adi-Benz; 01-18-2017 at 01:02 PM.
Old 01-18-2017, 01:04 PM
  #7  
Junior Member
 
pozi240's Avatar
 
Join Date: Jan 2016
Location: Ottawa, ON
Posts: 47
Received 5 Likes on 5 Posts
2012 C350 4Matic Sport
Originally Posted by Adi-Benz
Thanks for the info. There's a lot of questions I couldn't cover so thanks for getting a bit more into it.

Plan on going 265's instead of 275, 75's are too big. 255's aren't an option with the wheel choice so I suppose they won't work :S

This transfer case stuff is such a joke you would think a big german company like Mercedes would know how to make something solid by now. What can you expect I guess. So .4% being said then either will work because they are <1%? Or are those 2 not related.
Both proposed setups are under 1% difference, so, you should be fine (according to M-B). The OEM setup is only .4%, but .8% is still fine.
Old 01-22-2017, 08:09 AM
  #8  
Junior Member
 
teja1936's Avatar
 
Join Date: Feb 2006
Location: Sydney AUSTRALIA
Posts: 67
Received 3 Likes on 2 Posts
2010 Calcite C300 with AMG Sports Package
I am running the following: Front 8" X 18" with ET 45 with Continental ‘ContiSport3’ 235/40/18 (F) and Rear 9" X 18" with ET 54 with Continental ‘ContiSport3’ 265/35/18 (R) with no 'rubbing' issues whatsoever
Old 01-22-2017, 06:44 PM
  #9  
MBWorld Fanatic!
Thread Starter
 
Adi-Benz's Avatar
 
Join Date: Apr 2016
Location: Milwaukee, WI
Posts: 4,695
Received 547 Likes on 483 Posts
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
might as well blow the transfer case the sooner the better 215-295


weak sarcasm to myself
Old 01-22-2017, 06:45 PM
  #10  
MBWorld Fanatic!
Thread Starter
 
Adi-Benz's Avatar
 
Join Date: Apr 2016
Location: Milwaukee, WI
Posts: 4,695
Received 547 Likes on 483 Posts
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
How much will the spedos be off on both cases?
Old 01-23-2017, 09:22 AM
  #11  
Junior Member
 
pozi240's Avatar
 
Join Date: Jan 2016
Location: Ottawa, ON
Posts: 47
Received 5 Likes on 5 Posts
2012 C350 4Matic Sport
Originally Posted by Adi-Benz
How much will the spedos be off on both cases?
Not a 100% sure, but, here is a site I use to get percentages when running staggered tires.
https://tiresize.com/calculator/

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Will they fit



All times are GMT -4. The time now is 07:34 AM.