Shameful tyres. - Mercedes-Benz Forum
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post #1 of 4 (permalink) Old 11-14-2018, 09:02 PM Thread Starter
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Shameful tyres.

I've been meaning to change my rear tyres for a while, and finally got around to it today.

Holy MOJ, they were in a state when I had a chance to inspect them properly off the car.

It's fairly well observed that the inherent suspension/alignment set up on 171s can lead to uneven wear on the fronts - the inner edge suffering badly, but this was the case on my rears too.

After around 18 months and 9k miles on Uniroyal Rainsport 3 (255/35/18) not only was the inner 25% down past the markers, but there were huge chunks of compound missing, and splits across many areas of the tread. Also, the walls seemed to have developed weakness. Hand on heart, I've tried to baby this set of tyres, but inevitably the torque of the 55 is hard on them despite the ESP kicking-in early.

The car passed MOT inspection in April with no advisories, so I'll assume our hot summer accelerated the wearing.

I still like UR RS3s and never expected them to be high mileage tyres on a 55, but my takeaway advice is to check the inners on both front and rear more carefully than just a quick glance. Beware though - several 171 owners have reported shredding their fingers on exposed steel braiding on fronts...

The car feels much more composed again now.
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post #2 of 4 (permalink) Old 11-15-2018, 04:44 PM
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My SLK was chewing out the inside of the front tyres. I got a 3D four wheel alignment done and the technician found that the rear alignment was way out, so much it was affecting the thrust angle. Basically the rear alignment was so far out and the front was fighting against it to keep the car tracking straight, hence the tyre wear.
Once the rear was aligned within specs, the front then required a toe in adjustment. Front caster angle was perfect, camber was well within spec.
What a difference! Easier to steer, much better doing a full lock turn and the front tyres are now wearing much more evenly.
And all this only cost $95 AUD.
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post #3 of 4 (permalink) Old 11-20-2018, 12:57 PM
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Yep, my rear tires' inner lines were chewed up to metal mesh.
Something with the geometry of the rear.
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post #4 of 4 (permalink) Old 01-16-2019, 09:26 AM
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Similar issues with vibration & uneven noisy tire wear. Just had a dealer 4 wheel Alignment to fix issues with camber, toe, etc.... Made a huge difference!
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