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I am trying to figure out the proper psi for my 22 inch tires on my 2021 GLE 53 AMG SUV. I am thinking maybe 46 front & 45 rear? Attached is a copy of what is shown by the gas cap.
Thanks.
If you are running with few passengers and no big loads, the flap indicates 35F, 32R, for all tire sizes (non-winter tires). I interpreted, perhaps incorrectly, that the Snowflake on the bottom rows meant Severe Service Rated, which is an actual rating (3 peaks and snowflake on the tire), not an advertising claim like "All Season."
I am now running 41/36 with my 21's, and it's better handling than where I started 46/45 - rides better too. I'll keep trying lower over time, and don't expect to go back to the max until I start towing or put winter tires on.
And I may be wrong about the Snowflake on the gas flap meaning. But I didn't like that pressure. Unfortunately it doesn't look like I'll get any track time in this year (again) because of the virus, to dial in the handling pressures.
I have the Conti's.
I am trying to figure out the proper psi for my 22 inch tires on my 2021 GLE 53 AMG SUV. I am thinking maybe 46 front & 45 rear? Attached is a copy of what is shown by the gas cap.
Thanks.
Ride is not going to be good at those settings. I would go with the lower recommended settings or close to them unless you are heavily loaded, towing or on the track. What's odd is front pressure is higher than the rear when loaded, which is counterintuitive; just the opposite on my 450 with 21s.
If you are running with few passengers and no big loads, the flap indicates 35F, 32R, for all tire sizes (non-winter tires). I interpreted, perhaps incorrectly, that the Snowflake on the bottom rows meant Severe Service Rated, which is an actual rating (3 peaks and snowflake on the tire), not an advertising claim like "All Season."
I am now running 41/36 with my 21's, and it's better handling than where I started 46/45 - rides better too. I'll keep trying lower over time, and don't expect to go back to the max until I start towing or put winter tires on.
And I may be wrong about the Snowflake on the gas flap meaning. But I didn't like that pressure. Unfortunately it doesn't look like I'll get any track time in this year (again) because of the virus, to dial in the handling pressures.
I have the Conti's.
Looking forward to more input from others.
Mud & Snow/All Season appears to be a tire rating like Highway & 3 Peaks/Snowflake. Here’s one source....
I am trying to figure out the proper psi for my 22 inch tires on my 2021 GLE 53 AMG SUV. I am thinking maybe 46 front & 45 rear? Attached is a copy of what is shown by the gas cap.
Thanks.
My thoughts are like Greg’s on running close to the minimum listed, except maybe in winter around town. The different Temps might drop the pressure too much in below zero conditions vs in Spring to Fall the ambient temps will likely rise/stay closer to the same during the day.
I’ve observed as much as a 5 degree change in tire pressure & even 2 degrees higher on the sunny side. If you start low you could be running close to the higher number much of the time. That’s setting pressure in your garage without driving. A rule of thumb is to add 2 psi if you drive a short distance to fill the tire.
I’ve found that running Nitrogen on my 450 kept temperature variations closer but that was with 20” tires. Costco had a Nitrogen fill available for $8 a tire, might be higher now. I’m going to try Nitrogen again since it’s so inexpensive. The moisture in an air fill is partially responsible for wider temp fluctuations. Air Planes run Nitrogen (dry) because of the huge temp fluctuations in the air and on the ground. At best, we will only see a small benefit in most conditions.
My thoughts are like Greg’s on running close to the minimum listed, except maybe in winter around town. The different Temps might drop the pressure too much in below zero conditions vs in Spring to Fall the ambient temps will likely rise/stay closer to the same during the day.
Back to the previous thought, Ron, do you have any idea of why the specs call for raising the front tires more than the rear when you add load to the rear?
Back to the previous thought, Ron, do you have any idea of why the specs call for raising the front tires more than the rear when you add load to the rear?
It almost has to be the tire width/construction or possibly handling characteristics. Like you said it runs counter to what you would expect with more weight from the engine in the front. I’ll see if the Shop Foreman has an answer when I visit him in the next week or two.
Mercedes doesn’t have a 3 Peaks tire in our sizes yet so their mountain peaks refer to AS tires & possibly would include a 3 Peaks in the future.
That's a pretty accurate article, and it does show the exact 3 peaks/snowflake that's on the gas flap. I think the symbol must adhere to the international standard.
The M+S "all season" connection needs to be expanded, though. M+S is a Rubber Manufacturers' Association standard, which only states the ratio of void to rubber on the road, of the tread pattern. It doesn't have any performance correlation except that more voids SHOULD work in snow better. Blizzak proved that to be wrong!
Mercedes does have MO Severe Service tires in 20 and 21" sizes. Nokian and Vredestein also have non MO of the correct sizes and ratings, and other tire manufacturers seem to have others in development. Pirelli has all the diameters covered if you can go with a non-MO tire.
And BTW I mis-stated in my earlier post - I am now running 39F / 33R in my 21's. Like it but still experimenting.
Back to the previous thought, Ron, do you have any idea of why the specs call for raising the front tires more than the rear when you add load to the rear?
All I can think of is that the increased load is likely passengers, or cargo with seats folded down, which will be distributed between the axles.
I would guess it has to do with preserving predictable handling characteristics, as much as tire loading.
I haven’t checked recently but I didn’t think there were 3 Peaks tires in our sizes with Speed rating V for AMG’s. I saw MO Michelin Cross Climate’s on a GLE in March so they will probably begin to replace AS/M&S in some or many applications. There doesn’t seem to be that much of a mileage difference between the two.
Personally I would be OK with Speed H vs V since I don’t plan on driving over 100.
I haven’t checked recently but I didn’t think there were 3 Peaks tires in our sizes with Speed rating V for AMG’s. I saw MO Michelin Cross Climate’s on a GLE in March so they will probably begin to replace AS/M&S in some or many applications. There doesn’t seem to be that much of a mileage difference between the two.
Personally I would be OK with Speed H vs V since I don’t plan on driving over 100.
Yep, tires will be a conundrum for a while.
Pirelli has you covered in 20, 21, & 22", at speed rating W (168mph). Nokian & Vredestein in 20 & 21 V-rated. Some are MO, but that's less important to me than applications for my uses.
Choosing tires will become more difficult as time goes on, with the proliferation of sizes and shortage of raw materials. Lots of rubber and polymers going into PPE and gloves. Price increases, too.
The Michelin Cross Climates are the most likely to appear in the odd sizes that the AMG 53 uses - Michelin has gotten more aggressive now that Nokian has opened a new factory in the US and Goodyear bought Cooper. Cooper overstepped their Nokian US production agreement and started using Nokian compounding in Cooper tires. Then Goodyear bought Cooper, who had the Nokian chemistry. Bridgestone and Pirellii have also opened new factories in North America after the new NAFTA (USMCA) was accepted. Tire M&A's are stories in themselves!
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Back to the previous thought, Ron, do you have any idea of why the specs call for raising the front tires more than the rear when you add load to the rear?
I have 22s on my GLE53 AMG Coupe as well. I asked this question to the dealer, of course they didn't know. My theory (personal opinion) is probably because the rear tire has a larger contact patch than the front so not as much pressure is needed. But then my previous Cayenne also had a staggered setup and rear tire pressure required was more than the front. When I tow, I put the recommended pressures in. Most other times, I keep 41 front and 36 rear.
Is there a big difference between the MB-Tex vs leather? For example the Black MB-Tex Black v. Black Leather OR the Bahia Brown/Black MB-Tex versus the Bahia Brown/Black Leather?
Is there a big difference between the MB-Tex vs leather? For example the Black MB-Tex Black v. Black Leather OR the Bahia Brown/Black MB-Tex versus the Bahia Brown/Black Leather?
The leather has changed with the 2024 refresh. The MB-Tex has a history of issues but it might be a small percenage...it feels different to me. Personally I would not consided the MBT if I was keeping the car very long. I have the new Bajia Brown/Black leather and like the colors together. They give the car a quality, more exclusive look vs all black. There is also a portion that is microfiber (Dinamica) that adds to the look. Comments from friends bave been very complementary. I can't confurm but have read that the all black leather is similar in quality to the Bahia/Black, unlike in the past where they were different grades.
Is there a big difference between the MB-Tex vs leather? For example the Black MB-Tex Black v. Black Leather OR the Bahia Brown/Black MB-Tex versus the Bahia Brown/Black Leather?
We did not like MB Tex. It made us sweat. The leather is much nicer IMO
I have 22s on my GLE53 AMG Coupe as well. I asked this question to the dealer, of course they didn't know. My theory (personal opinion) is probably because the rear tire has a larger contact patch than the front so not as much pressure is needed. But then my previous Cayenne also had a staggered setup and rear tire pressure required was more than the front. When I tow, I put the recommended pressures in. Most other times, I keep 41 front and 36 rear.
What tires do you have on your '21 53 coupe and how has the wear been since your last post? I am running 22' Michelin PS4S and after 8000 miles they are down to 4/32. I keep them at 38 psi front 36 psi rear despite the recommendations on the fuel cap.
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