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My favorite winter tire, the Nokian R3 SUV isn't on that list. It does come in a staggered 21-in fitment, so that must be a list of MO and MO1 designated tires.
I don't think there's a non-studded winter tire that's in the same class as the Nokian.
This list is broader than MO and MO1, but contains only OEM dimensions. Where did you buy the Nokiens and did you have to use non-OEM dimensions? Tire Rack typically carries every tire on the market and they don’t offer the Nokians in OEM dimension.
Last edited by Missourian; Aug 6, 2025 at 07:20 AM.
This list is broader than MO and MO1, but contains only OEM dimensions. Where did you buy the Nokiens and did you have to use non-OEM dimensions? Tire Rack typically carries every tire on the market and they don’t offer the Nokians in OEM dimension.
You really did it.
Thanks for this
So just to be clear, I have the 23's on my 580, I can get OEM 21's without fitment issues to get a winter or all season ? Any impact on speedometer doing this ?
So just to be clear, I have the 23's on my 580, I can get OEM 21's without fitment issues to get a winter or all season ? Any impact on speedometer doing this ?
You will need to check with your parts department. My dealer tried 21" on mine with AMG line but I believe that the tires rubbed. 22" should work, but it's such a minimal change that I haven't moved forward with it.
Plus I don't need winter tires in Florida, but I would like All Season tires. Of course, there are none for 23" or 22".
Per the Discount Tire size calculator (Discount Tire and Costco were the 2 largest customers of the major tire brand I worked for), going from 23" OEM tire size to 21" OEM tire size will mean when your speedometer reads 65 mph, your actual speed is 62.9, a 3.3% smaller tire. I'm not sure how these cars compensate the speedometer, but there's definitely a way to do it.
When a tire is mounted, it doesn’t match the tire size calculator because there are more parameters that go into a tire’s carcass size than the 3 listed in the published sizing, so take the calculator results with a grain of salt. Even a different model tire within the same brand can be listed as the same size but the actual physical size can be different.
This list is broader than MO and MO1, but contains only OEM dimensions. Where did you buy the Nokiens and did you have to use non-OEM dimensions? Tire Rack typically carries every tire on the market and they don’t offer the Nokians in OEM dimension.
I've bought Nokian's from Discount Tire, Big O, Simple Tire, and my local tire store.
21's were available last fall, but I don't see any rears right now.
Availability can limit what is seen on websites, and in late summer there may not be many winter tires available, in any size, from any manufacturer.
I don't really like Tire Rack, except for their reviews on YouTube, which can be excellent. I was hoping for an improvement after Discount Tire bought Tire Rack, but I haven't seen much change.
Simple Tire seems to be the most knowledgeable about Nokians. Or my local store, where their counter guy used to work for a Nokian Distributor.
Per the Discount Tire size calculator (Discount Tire and Costco were the 2 largest customers of the major tire brand I worked for), going from 23" OEM tire size to 21" OEM tire size will mean when your speedometer reads 65 mph, your actual speed is 62.9, a 3.3% smaller tire. I'm not sure how these cars compensate the speedometer, but there's definitely a way to do it.
Some members have mentioned the ability to change tire sizes using an OBD2 diagnostic tool on other MB models. Perhaps a coder can chime in like @EleBest or forum member @S-Prihadi who is well acquainted with those OBD2 tools.
Can it be possible that
Hankook Dynapro evo AS (RA21) 315/40ZR21 115Y XL
are only $294 per tire ?
I'm interested in them but cant find any reliable reviews for them.
I am going with 21" wheels to get an all season tire.
But I see the fronts would be
Hankook Dynapro evo AS (RA21) 275/40ZR21 115Y XL only not 45
Anyone know what problem if any this would present ?
Last edited by lungs414; Aug 11, 2025 at 04:45 PM.
Reason: more info
You will need to check with your parts department. My dealer tried 21" on mine with AMG line but I believe that the tires rubbed. 22" should work, but it's such a minimal change that I haven't moved forward with it.
Plus I don't need winter tires in Florida, but I would like All Season tires. Of course, there are none for 23" or 22".
Per the Discount Tire size calculator (Discount Tire and Costco were the 2 largest customers of the major tire brand I worked for), going from 23" OEM tire size to 21" OEM tire size will mean when your speedometer reads 65 mph, your actual speed is 62.9, a 3.3% smaller tire. I'm not sure how these cars compensate the speedometer, but there's definitely a way to do it.
When a tire is mounted, it doesn’t match the tire size calculator because there are more parameters that go into a tire’s carcass size than the 3 listed in the published sizing, so take the calculator results with a grain of salt. Even a different model tire within the same brand can be listed as the same size but the actual physical size can be different.
You can not do what you are saying. The options are based on how the car is ordered
once a car fits the 22 or 23 in tires.. its tunned dor that wheel size...
if you downsize... the calculator has to bee based on the original size..
so no you can not fit the 21 in tires on the 23 in tires...
those are smaller...
You can not do what you are saying. The options are based on how the car is ordered
once a car fits the 22 or 23 in tires.. its tunned dor that wheel size...
if you downsize... the calculator has to bee based on the original size..
so no you can not fit the 21 in tires on the 23 in tires...
those are smaller...
Missourian is an engineer and someone who worked for a major tire manufacturer. I think he is qualified in his opinion. What information do you have to back up you claim. No offense but if it’s your opinion I will trust Missourian.
I think this is a lost in translation issue. I may be wrong but what I think he is attempting to say is that you cannot put a 21" tire on a 23" wheel which is in fact correct obviously.
Missourian is an engineer and someone who worked for a major tire manufacturer. I think he is qualified in his opinion. What information do you have to back up you claim. No offense but if it’s your opinion I will trust Missourian.
Your response actually means that you do not understand the matter and only base your knowledge on someone elses opinion ... you gotta do research.
Missourian is an engineer and someone who worked for a major tire manufacturer. I think he is qualified in his opinion. What information do you have to back up you claim. No offense but if it’s your opinion I will trust Missourian.
I may be a doctor and when i donot understand a subject yes.. i do read what people say. SOMETIMES i am wrong sometimes other are wrong.
what happened here is the following.
this suv has too many wheel size options but.... on the 22 and 23 inch tire sizes... the overall tire circunference and tire diameter changes.. too much over the "normal" 21 in spec.
WHAT I SAID, which you did not read to a full understanding is that I who have a gls with ....
285/40R23 fronts and 325/35R23 rear have a bigger tire... that that owner who has the 21 with 275/45R21 and 315/40R21 rears...
IF i went to swap themm my car... is tunned for a bigger diameter... for which the rotation is larger than the other.
what will end up happenind is that it will star reading that i am"driving" the same distance while in reallity i am not... im doing less distance... so my speedo is gonna read 3% wrong... so its gonna read "higher".... if its the otherr way around... is gonna read 3% lower....
so yeah.... what they do to tune the different sizes i do not know... but... they do...
all you cannot do... is swap a 21 into a 23 like the sticker say... you have to do an equuvalent... which in turn is gonna be a 275/50R21 in fronts... more less to equal the size... now you get me? Or still you do not understand the matter....
Changing wheel and tire size can take some time using a tire size calculator to find close circumference matches and widths that won't rub, and then checking the tire brands and models to see what size are available. But it's possible to find a combination that works. I downsized 22" staggered run-flats on my X7 to 20" squared-up non run-flats, staying with the original front tire spec width and ended up with less than 0.5% circumference difference. On my G550, I upsized slightly from the OE 275/50R20 to 275/55R20 in order to mount an A/T 3MPSF tire I wanted. This imposed a 3% circumference change and a consequential speedo/odo error. Circumference changes can be corrected if you have access to the right equipment. I have a Topdon OBD scanner that provides tire size change coding for several car brands, but unfortunately not MB. I briefly played with what I thought might be tire size variant coding on my Launch OBD scanner, but without success.
I may be a doctor and when i donot understand a subject yes.. i do read what people say. SOMETIMES i am wrong sometimes other are wrong.
what happened here is the following.
this suv has too many wheel size options but.... on the 22 and 23 inch tire sizes... the overall tire circunference and tire diameter changes.. too much over the "normal" 21 in spec.
WHAT I SAID, which you did not read to a full understanding is that I who have a gls with ....
285/40R23 fronts and 325/35R23 rear have a bigger tire... that that owner who has the 21 with 275/45R21 and 315/40R21 rears...
IF i went to swap themm my car... is tunned for a bigger diameter... for which the rotation is larger than the other.
what will end up happenind is that it will star reading that i am"driving" the same distance while in reallity i am not... im doing less distance... so my speedo is gonna read 3% wrong... so its gonna read "higher".... if its the otherr way around... is gonna read 3% lower....
so yeah.... what they do to tune the different sizes i do not know... but... they do...
all you cannot do... is swap a 21 into a 23 like the sticker say... you have to do an equuvalent... which in turn is gonna be a 275/50R21 in fronts... more less to equal the size... now you get me? Or still you do not understand the matter....
Jesus pal. It’s not like I pissed in your cornflakes. Take it easy. I very careful and really was not trying to insult you, but seems you were. You know what, after your response I wish I did **** in them.
Have the day you deserve.
Jesus pal. It’s not like I pissed in your cornflakes. Take it easy. I very careful and really was not trying to insult you, but seems you were. You know what, after your response I wish I did **** in them.
Have the day you deserve.
Thats the best you got? **** on them, bring it Pal.
But the second one have the day i deserve is quite strong. Thats a good one.
THEN AGAIN I HOPE YOU GOT MY RESPONSE
Forgot to add that I use these bags for storing and transporting my summer and winter tires. They're thick enough to not tear and large enough to hold these big 32" tall tires and pinch the bag closed to keep the smell contained.
Forgot to add that I use these bags for storing and transporting my summer and winter tires. They're thick enough to not tear and large enough to hold these big 32" tall tires and pinch the bag closed to keep the smell contained.
I've read that sealing tires in air-tight bags is not always a good idea. I use tire covers such as these to keep the dust off them, but that allow for ventilation.
I've read that sealing tires in air-tight bags is not always a good idea. I use tire covers such as these to keep the dust off them, but that allow for ventilation. https://www.amazon.com/dp/B00IQILFF2...d_asin_title_2
It's important to keep UV and Ozone away from tires. Oxygen in general.
Every tire store I use provides bags.
Those are better because of the handles, but I question the "ventilation" idea. Where did you see that?
It's important to keep UV and Ozone away from tires. Oxygen in general.
Every tire store I use provides bags.
Those are better because of the handles, but I question the "ventilation" idea. Where did you see that?
Unfortunately, I don't recall the source of this, but the justification was that rubber outgases and trapping the gases in a sealed bag was not good for the tire. However, other sources (including some tire manufacturers) do recommend sealed bags, and for the truly OCD types, evacuating the bags, or better yet filling the bags with nitrogen, is best. And a sealed bag filled with nitrogen over-wrapped with a tire carrier (such as the Michelin carrier I referenced) is as good as it can get by making the tire easier to handle. Storage in a cool dry environment free of UV and ozone is probably more critical than bagging. I've never stored tires at a tire shop or tire service -- any idea if they bag the tires?
