Optimal 21" Tyre size for GLC

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Mar 5, 2025 | 05:58 PM
  #1  
Hello, i would need some advice for choosing the right tyre size for my GLC400d i just bought last week.

I'm currently eyeing 265/40 R21 on front and rear, rim would be 9.5J ET30.

Would that work? because i haven't see anybody here use the same 265 tyre on all 4's
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Mar 6, 2025 | 07:17 AM
  #2  
I went with the 9” front wheel ET+30 and currently on 255/40/R21. Planning on 265/40/R21 this spring. It is already very very close to the suspension members so the extra.5” and tire choice may dictate if you rub or not. Will you be lowering your vehicle at all? If not, you should be good.

Rears will absolutely fit but you may want some spacers to fill out the stance a bit more.
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Mar 6, 2025 | 05:55 PM
  #3  
Quote: I went with the 9” front wheel ET+30 and currently on 255/40/R21. Planning on 265/40/R21 this spring. It is already very very close to the suspension members so the extra.5” and tire choice may dictate if you rub or not. Will you be lowering your vehicle at all? If not, you should be good.

Rears will absolutely fit but you may want some spacers to fill out the stance a bit more.
Maybe ET35 would be a safer option? I'm leaving the stock suspension, i want to keep it comfy.

Spacers on rears is a must, i absolutely agree.
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