Do You Know The Correct Tire Pressure Inflation On 20 Inch Tires?
Thread Starter
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,842
Likes: 5
From: Chicopee Ma
White S63 AMG W/Designo Interior
Do You Know The Correct Tire Pressure Inflation On 20 Inch Tires?
i just put 20 inch tires on my s500 and i want to know the correct tire pressure, i have 40 PSI all the way around currently, because thats what the tire shop said since its a 20 inch tire,275/30/20 in rear, 245/35/20 in front tires, with the 40 psi i feel the bumps way too much, i had 20 inch tire before, and ride was smooth, but i forgot what the tire pressure was.
what tire pressure do you guys recommend on 20 inch tires to still get a soft ride front and rear psi? thanks in advance
what tire pressure do you guys recommend on 20 inch tires to still get a soft ride front and rear psi? thanks in advance
MBWorld Fanatic!
Joined: Oct 2006
Posts: 1,203
Likes: 2
From: Vancouver BC
Flying Spur
i keep them at 42 up front and 38 rear...reason being that the roads here are pretty bad and with higher air pressure theres less chance of the wheels bending...if your roads are okay and not worrying about bending them...lower them to 35 all around you should notice a difference...
Member
Joined: Apr 2007
Posts: 119
Likes: 0
From: Marietta, GA
04 S55 AMG
Question why are you folks flipping the tire pressure, in that why you running higher fronts then rears? Ive always ran higher on rears on RWD cars. Im running 34-37 on my 20s right now.
Dixit
Dixit
Trending Topics
Member
Joined: Sep 2007
Posts: 124
Likes: 0
From: Coconut Grove, Fl.
2000 S430
my guess is that big chunk of metal under the hood in the front of the car thats rather heavy
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Member
Joined: Apr 2007
Posts: 119
Likes: 0
From: Marietta, GA
04 S55 AMG
Thread Starter
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,842
Likes: 5
From: Chicopee Ma
White S63 AMG W/Designo Interior
yea lol kinda confused me too?i think its maybe since theres less weight in rear, it makes it so the tires are little softer and grip a little better
MBWorld Fanatic!
Joined: Jul 2006
Posts: 1,578
Likes: 7
04 S430 (sold),05 X5 4.4i, 02 325i, 87 560SL, 85 Alfa Romeo
Member
Joined: Apr 2007
Posts: 119
Likes: 0
From: Marietta, GA
04 S55 AMG
I understand that, what Im still asking why people are flipping it? Normally I take the OEM specs and then bump then up by 2-4psi when I go bigger in size.
Tirerack recommends going up 1psi for each inch of rim size increase.
Sounds like one could just find out what the S63/65 has their set at since they use 20s.
Dixit
Tirerack recommends going up 1psi for each inch of rim size increase.
Sounds like one could just find out what the S63/65 has their set at since they use 20s.
Dixit
Member
Joined: May 2005
Posts: 244
Likes: 0
From: Irvine and San Diego, CA
2006 S55 & 97 T88h Supra
doesnt the rear tire heat up quicker than the fronts because the power is put down in the rear? I have my 20s at pretty high pressure levels compared to you guys. Im running a 40 up front and a 38 in the back. I believe the tire states to not exceed 45 psi? With all my driving, the TPMS has never peaked past 45 when the tires were inflated at a cool 38-40. But again, i live in So Cal and not the piping hot dessert of NV or AZ.
Newbie
Joined: Dec 2010
Posts: 2
Likes: 0
From: Southern California
S500
2006 S500
I notice most of you are not telling the year of the vehicle. Does it matter? I have a tire pressure monitor on my car that tells me that the pressure is incorrect. I currently have 34 front and 35 rear. I know I need more air since I'm running on 18" What is the correct pressure for 18" and 20" since I have both sets of tires?
