GLC63s, GLC63, GLC43 AMG SUV and Coupe (X253, C253) 2015 - Present

21 inch aftermarket wheels question

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Old 04-08-2024, 08:09 PM
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21 inch aftermarket wheels question

Hi. I have been is discussion with 3 different after market wheel suppliers (HRE and BC Forge and Vossen) and I would like the opinions on the following: I would like to put 21x9 ET+25 wheels in the front and 21x11.5 ET+20 in the back.
On a GLC63 it's very possible. No issues. I contacted BC Forge and they said this setup would be good for a GLC43 too. But HRE and Vossen says that the back configuration should be changed to 21x10.5. The 21x11.5 would not fit because of the different suspension the GLC63 has.
Does anyone here have ever tried this type of configuration 21x11.5 ET +20 in the back? The front should be no problem according to all 3 (HRE and BC Forge and Vossen). But the back is the issue. Dan at BC Forge says there should be no problems at all for a GLC43.
Any guidance or help would be appreciated.
Old 04-09-2024, 08:08 AM
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Have you shopped for tires yet?
Old 04-09-2024, 08:47 AM
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I have been recommended to go with 275/35ZR21 in front and 325/30ZR21 in the back. They will be the Michelin Cup2 tires.
Old 04-09-2024, 09:20 AM
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The 325's will fit 10.5" to 12.5" wheels, so why not play it safe with the 10.5" ?
Old 04-09-2024, 09:33 AM
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It's simply because I would like a wider look. Last year I bought some Vossen wheels 21x9 +32 in front and 21x10.5 +30 in the back and the back did not look flush at all to the fender. I was quite disappointed. I had to add 30mm H&R spacers for the back wheels to look more aggressive. But again 10.5 might be the best way to go but some GLC63 owners do run 21x11.5 +20 in the back and have no issues. Some say it's no issues for the GLC43 but others say that the rear suspension is different and it is not recommended.
Old 04-09-2024, 09:59 AM
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My X7 came with a staggered 22" setup 275/40R22 (F) & 315/35R22 (R) Continental run-flat performance (summer) grade. Worst possible setup for my planned driving -- long road trips. Not wanting to get stuck in an early summer snow storm in Tahoe, or be stranded for a week in Elko NV with an unrepairable flat, I switched out to a squared-up set of 275/50R20 Michelin CC2s (non-RFs). Not as cool looking but more practicable for travel. Better tread wear, softer ride, less noise, all weather traction, much better price and availability.
Old 04-09-2024, 08:43 PM
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Originally Posted by GLC43-2020
It's simply because I would like a wider look. Last year I bought some Vossen wheels 21x9 +32 in front and 21x10.5 +30 in the back and the back did not look flush at all to the fender. I was quite disappointed. I had to add 30mm H&R spacers for the back wheels to look more aggressive. But again 10.5 might be the best way to go but some GLC63 owners do run 21x11.5 +20 in the back and have no issues. Some say it's no issues for the GLC43 but others say that the rear suspension is different and it is not recommended.
One further note - you might find wheels you're looking at have different offset specs. You might find a 10.5" with an offset that will place the tire flush with the fender, and produce the look you want without spacers.
Old 04-10-2024, 11:39 AM
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On the 43 and 63 I thought the main suspension platform was the same with the air body control suspension !

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