tire question for 19" rims
Thread Starter
Newbie
Joined: Jul 2021
Posts: 2
Likes: 1
From: California
2016 cls 400
tire question for 19" rims
hello all i have 2016 cls 400 rwd
i need help with tire size im currently on 255/35/19 and 285/30/19 and was told i can run 285/35/19 in rear for more comfort. would this fit my car ? wondering if anyone has installed any other sizes besides the factory recommended ones
thanks in advance
i need help with tire size im currently on 255/35/19 and 285/30/19 and was told i can run 285/35/19 in rear for more comfort. would this fit my car ? wondering if anyone has installed any other sizes besides the factory recommended ones
thanks in advance
Super Member
Joined: May 2015
Posts: 606
Likes: 88
From: North Cali
2005 SL500, 2015 CLS400
Shouldn't be any problem. Only thing to keep in mind is it for AWD you have to make sure the front height matches the rear ones. but for a regular RWD 5% increase in tire height won't do anything bad.
Super Member
Joined: May 2015
Posts: 606
Likes: 88
From: North Cali
2005 SL500, 2015 CLS400
Correction of my post - 5% increase from the tire width. Not a 5% total increase.
For people confused - the 285 stands for 285 mm width, 35 stands for 35% of the width. so the total height will go up 2-3mm, if that. it's critical to ensure same height front and rear for AWD cars, as some will disable the function or will throw an error on your dash. There are plenty of sites that will help you do the math if you want to upsize the tires.
For people confused - the 285 stands for 285 mm width, 35 stands for 35% of the width. so the total height will go up 2-3mm, if that. it's critical to ensure same height front and rear for AWD cars, as some will disable the function or will throw an error on your dash. There are plenty of sites that will help you do the math if you want to upsize the tires.
Last edited by Ghostty; Jul 10, 2021 at 06:49 PM.
Super Member
Joined: May 2015
Posts: 606
Likes: 88
From: North Cali
2005 SL500, 2015 CLS400
If that's the case then the only way you'll actually see the difference is by putting the tire on the wheel and trying it on, lol...
I assumed tire manufacturers do match the size indicated. I could understand if a lower brand wouldn't do that, but the top ones should match... Is that info verified or you're talking about own experience?
I assumed tire manufacturers do match the size indicated. I could understand if a lower brand wouldn't do that, but the top ones should match... Is that info verified or you're talking about own experience?
Super Member
Joined: May 2015
Posts: 606
Likes: 88
From: North Cali
2005 SL500, 2015 CLS400
Sorry, didn't have access to my laptop earlier.
So according to tire calculator site, the difference in overall diameter is +0.4 inch / 11mm, or 1.6%. Also the R17 tire is wider by 1.2 inch or 30mm, or 14.8%.
So even if the 45% seems to be less than 55% on the first tire size, since the total width is greater and the wheel is 1 inch bigger, the overall diameter is still bigger.
For tire sizes indicated but both R16, the overall size is -0.6 inch total diameter between 205/55 R16 vs 235/45 R16
Regards
So according to tire calculator site, the difference in overall diameter is +0.4 inch / 11mm, or 1.6%. Also the R17 tire is wider by 1.2 inch or 30mm, or 14.8%.
So even if the 45% seems to be less than 55% on the first tire size, since the total width is greater and the wheel is 1 inch bigger, the overall diameter is still bigger.
For tire sizes indicated but both R16, the overall size is -0.6 inch total diameter between 205/55 R16 vs 235/45 R16
Regards
Last edited by Ghostty; Jul 9, 2021 at 01:22 AM.
