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GLK-Class (X204) Produced 2008-2014

4matic mismatched tire

     
Old Jan 24, 2023 | 12:06 PM
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2013 GLK 350
4matic mismatched tire
So I recently bought a 2013 GLK 350 4matic, although all tires were fairly new, i just noticed rear passenger side was mismatched and had a 55 aspect ratio intead of 50 like the other three. I immediately purchased another similar tire of the proper size but still mismatched. Will this cause damage to the 4matic system or anything else?
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Old Jan 25, 2023 | 07:13 PM
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bone stock E55 AMG
moved to X204 forum...
you bought new tire and it's still 55 profile and not 50???
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Old Jan 25, 2023 | 07:19 PM
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2013 glk 350
They need to be the same diameter or it’s a possibility the 4matic system will see it as slipping and try to constantly adjust. Possibly damaging something
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Old Jan 25, 2023 | 07:32 PM
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'17 GLS450, '14 GLK250, Grandpa's Roadster
What is the whole number (e.g. 235/50-19) for each tire? It's the rolling circumference that matters, not the aspect ratio.
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Old Jan 26, 2023 | 01:31 AM
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
Originally Posted by slavach
So I recently bought a 2013 GLK 350 4matic, although all tires were fairly new, i just noticed rear passenger side was mismatched and had a 55 aspect ratio intead of 50 like the other three. I immediately purchased another similar tire of the proper size but still mismatched. Will this cause damage to the 4matic system or anything else?
We can twist ourselves into some tight knots over this issue!
If the tire is the proper size, then the the mis match will be only in brand and/or tread pattern or possible load range. Tread pattern can have some braking and traction impact, but that is likely to be noticeable only in the most extreme conditions.
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Old Jan 26, 2023 | 10:00 AM
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2013 GLK 350
No. The new tire is a 50. They are now all 235/50/19. But the new one is not a michelin like the others although it has a similar tread pattern.
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Old Jan 26, 2023 | 04:30 PM
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From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Originally Posted by slavach
They are now all 235/50/19. But the new one is not a michelin like the others although it has a similar tread pattern.
OK, that will probably be fine. If it were my car, I'd probably buy two matching tires and put them on the back. Save the third one in case one of the others needs to be replaced prematurely.
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Old Jan 30, 2023 | 11:16 PM
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Every time you turn your wheels are running different speeds/distances. If it was big enough issue your ESP would be freaking out.
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Old Jan 31, 2023 | 09:28 PM
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From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Originally Posted by NYCGLK
Every time you turn your wheels are running different speeds/distances.
GKL turning radius is 19' and the track is 5' so the inner tire at full lock is turning about 80% speed and distance of the outer one. The difference between a 235/55-19 and a 235/50-19 is about 4%.
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