C450/C43 Wheel Fitment Guide
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Do some research on how tire fitments work. Reading through this thread I can't believe how many people want to spend thousands on wheels and aren't really keen on how wheel offsets and tire sizes work and are willing to trust random internet people on big wheel purchases. People like "Hey..figure this out for me". lol. Man YouTube and google, it's easy. Get smart on this stuff it can save you a lot of money and you'll be able to explain how you modded your car too when someone asks you.
Go measure the gaps that you have in the front and back. Jack it up yourself or take it somewhere. This is easy since you aren't getting a different wheel. Take a picture of it so you have it. Notice some people in this thread posted pictures of how much gap they had between their tire and their suspension? Measure what you have now and compare. I wouldn't spend any money until you measure it for yourself.
Judging from your post your main complaint is the comfort. If that's the case then go for a wider tire. Look at this website https://tiresize.com/calculator/ and compare the size difference from a 225/40R19 (stock front) to a 235/40R19. There is a .4" width difference so you are going to need an additional .2" inside for a good fit. You obviously know that the handling will be affected by a bigger tire...how much bigger do you want to go? "I don't want it to rub against any parts and effect the handling too much"....this is really subjective and personal preference, pick your poison.
Personally I like to go with a tire that is pretty close to an exact fit for the wheel that I am getting. It's cheaper, better handling, technically better gas mileage. I have 8.5" and 9.5" wheels with 235/40 R 19 and 265/35 R 19 in Michelin PS4S. I think that is pretty much the chalk for 19s staggered.
225/40 R19 and 255/35 R19 is perfect for the stock setup if you ask me, just not in a run flat. If I were you I wouldn't rage out and go for a huge tire and a drastic change because you want more comfort...once you experience how much better the car is on a standard tire vs. a run flat you'll see.
Last edited by VitaminJB; May 17, 2020 at 12:27 AM.
Will this fitment work on a C450 on H&R springs?
Vorsteiner VFF-101
front: 19x8.5 +45 (gonna use a 15mm spacer to bring to +30), 225/40/19
rear: 19x9.5 +46 (possibly using a 5mm), 255/35/19
The Best of Mercedes & AMG
Normally I would take a tire of 225 and 265 would be ideal for 4 wheel drive
the rim at the front is 8.5 y, should I take a 235 ?
Thank you!
255/40/19
I just did that. You will be fine.
So I have stock measurements for both rims and tires. No spacers, no modifications. I don’t understand how you guys can go for 8,5” wide in front without rim poke out and risk of touching the fender
Careful selection of the offset will enable you to go for a 8.5” wide front wheel. ET30-32 would be about right.
19x8.5 et 30 front
19x9.5 et 45 rear
Also purchased toyo proxes sport in these specs.
Front 235/40 R19xl 96y
Rear 265/35 R19xl 98y
Just had fountain tire tell me these do not fit and that they rub on the inside and poke out pass fender.
im loss for words as i researched this forum like crazy yet my calculations arent correct. Do i need wheel spacers or am i stuck now.
If wheel spacers are needed which is my best option for this set up i purchased.
Last edited by phillyAMG; Jun 17, 2020 at 11:41 PM.
19x8.5 et 30 front
19x9.5 et 45 rear
Also purchased toyo proxes sport in these specs.
Front 235/40 R19xl 96y
Rear 265/35 R19xl 98y
Just had fountain tire tell me these do not fit and that they rub on the inside and poke out pass fender.
im loss for words as i researched this forum like crazy yet my calculations arent correct. Do i need wheel spacers or am i stuck now.
If wheel spacers are needed which is my best option for this set up i purchased.
19x8.5 et 30 front
19x9.5 et 45 rear
Also purchased toyo proxes sport in these specs.
Front 235/40 R19xl 96y
Rear 265/35 R19xl 98y
Just had fountain tire tell me these do not fit and that they rub on the inside and poke out pass fender.
im loss for words as i researched this forum like crazy yet my calculations arent correct. Do i need wheel spacers or am i stuck now.
If wheel spacers are needed which is my best option for this set up i purchased.
also with your set up did you require spacers at all?
Last edited by phillyAMG; Jun 18, 2020 at 12:23 AM.
My wheels are custom so I was able to have the exact offsets I wanted front and rear. 19x8.5 +30 f, 255/35 19f and 19x10 +55 r, 295/30 19r.
My wheels are custom so I was able to have the exact offsets I wanted front and rear. 19x8.5 +30 f, 255/35 19f and 19x10 +55 r, 295/30 19r.










