Wheel and tyre upgrade
Thread Starter
Junior Member
Joined: Sep 2016
Posts: 45
Likes: 5
From: UK
Mercedes Benz S500L and S500 Night Edition
Wheel and tyre upgrade
Good Evening Chaps,
The stealership have told me that 2 of my wheels cannot be balanced accurately because they have been damaged somehow. So I thought I would upgrade my wheels while I’m about it. My 2010 S550 W221 has Front & Rear alloy wheels: 18x8.5" ET43
Wheel part number: MER B66474531
Additional alloy part number: A2214015102 with 255x45 tyres all around. I want to upgrade to the S600 Front alloy wheels: 18x8.5" ET43
Wheel part number: MER B66474532
Additional alloy part number: A2214015202
Rear alloy wheels: 18x9.5" ET43
Wheel part number: MER B66474533
Additional alloy part number: A2214015302 255x45 and 275x45 tyres respectively. The extra width on the rear is 0.8” the revs per mile decreases from 746 to 727, the rear rolling diameter increases from 84.9” to 87.1” and the rear tyre hight from 27” to 27.7”. My questions are as follows:
1/ Will the drivability be affected by the slight difference in hight and width from back to front?
2/ Will the steering geometry, Ie caster camber toe in etc need to be changed for the new set up to mimic the S600 (if any different. These were standard on the S600 apparently)
3/ Will the speedometer be put out by much with the slightly increased diameter and if so how do I fix it?
I’m hoping too that the increase in width will give me better traction when I pull away and stopping me screeching the tyres and looking a fool on the odd occasion.
Is there anything else I haven’t thought of?
Any advise would be much appreciated.
Best
garno
The stealership have told me that 2 of my wheels cannot be balanced accurately because they have been damaged somehow. So I thought I would upgrade my wheels while I’m about it. My 2010 S550 W221 has Front & Rear alloy wheels: 18x8.5" ET43
Wheel part number: MER B66474531
Additional alloy part number: A2214015102 with 255x45 tyres all around. I want to upgrade to the S600 Front alloy wheels: 18x8.5" ET43
Wheel part number: MER B66474532
Additional alloy part number: A2214015202
Rear alloy wheels: 18x9.5" ET43
Wheel part number: MER B66474533
Additional alloy part number: A2214015302 255x45 and 275x45 tyres respectively. The extra width on the rear is 0.8” the revs per mile decreases from 746 to 727, the rear rolling diameter increases from 84.9” to 87.1” and the rear tyre hight from 27” to 27.7”. My questions are as follows:
1/ Will the drivability be affected by the slight difference in hight and width from back to front?
2/ Will the steering geometry, Ie caster camber toe in etc need to be changed for the new set up to mimic the S600 (if any different. These were standard on the S600 apparently)
3/ Will the speedometer be put out by much with the slightly increased diameter and if so how do I fix it?
I’m hoping too that the increase in width will give me better traction when I pull away and stopping me screeching the tyres and looking a fool on the odd occasion.
Is there anything else I haven’t thought of?
Any advise would be much appreciated.
Best
garno
