Is this normal tire wear?
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Originally Posted by sdg1871' post='1044413' date='Oct 31 2009, 07:11 PM
Well, 35,000 kilometers is 21,747 miles. That is a decent tire life for summer performance tires. I believe that you got that much because you did largely highway driving. As far as pressure goes, for my summer tires, I follow the BMW recommended PSI which for the 550i Sport with staggered setup is 36 PSI front and 44 PSI rear. 32 PSI seems quite low but I know nothing about what pressure RFTs should be inflated to. Look at this as a golden opportunity to ditch the numbflats for the much more comfortable non-RFT tires.
And yes, I'm going to go with non-RFT, perhaps the PS2's
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Originally Posted by Canada545' post='1044417' date='Oct 31 2009, 08:15 PM
Really, 44 psi in the rears?
I personally run 38F and 42R with my 245/35/19F and 285/30/19R tires on my 545i
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Originally Posted by mrfva' post='1044419' date='Oct 31 2009, 08:18 PM
It varies; people run different front/rear PSI.
I personally run 38F and 42R with my 245/35/19F and 285/30/19R tires on my 545i
I personally run 38F and 42R with my 245/35/19F and 285/30/19R tires on my 545i
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Originally Posted by Canada545' post='1044406' date='Oct 31 2009, 08:03 PM
Most of my driving was highway ... heading to the golf course with 3 or 4 guys / clubs in the car.
Get the PS2s - they are outstanding.
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Originally Posted by Canada545' post='1044417' date='Oct 31 2009, 09:15 PM
Really, 44 psi in the rears? Wow, I has have misread my manual because I thought 32 psi was correct ...
And yes, I'm going to go with non-RFT, perhaps the PS2's
And yes, I'm going to go with non-RFT, perhaps the PS2's
As far as summer tires go, PS2s are one of the best price no object tires. They are not known for long tread life. But I have never met a PS2 owner who did not like them a lot.
Given how fast I blow through tires, I went with a much less expensive tire that has pretty equivalent performance to the PS2s (at least according to this summer's Car and Driver comparo and by rave reviews from some of our members): the Hankook Ventus V12 Evo. The Hankooks cost me $185 per rear tire from Tire Rack versus about $400 per rear tire for the PS2. Nonethless, if I had unlimited funds, I would have bought the PS2s.
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Originally Posted by Canada545' post='1044396' date='Oct 31 2009, 06:49 PM
Is this an issue with the manufactory (Dunlop), an issue with the run flat tires, an issue with my e60 545 or is this normal?
2. Recommended inflation pressures for the 18-inch Y-series tires: Front - 32-38 psi, Rear - 35-42 psi, depending on loading. So, min recommended pressure in the rears is 35 psi.
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Originally Posted by sdg1871' post='1044399' date='Oct 31 2009, 04:51 PM
Good lord. My OEM non-RFT rear summer Contis wore evenly and I wore them down a lot. I wonder if you have an alignment problem.
It not an alignment problem Scott, my rears were much more cambered inward when I had the 125's on there than the 172's. the 172's seem to flatten out the negative camber much better than other wheels. With the 125's the negative camber was VERY noticeable, with the 172's? Barely perceptible.
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In the UK we have speed reduction measures called speed cushions.
These are speed 'humps' which do not cover the full width of the road, but are in each cariageway and are champfered at the sides, a bit like a short pyramid shape with a flat top.
The track width of many cars is such that they can drive over these and only the inside edges of the tyres ride over the raised angeld sides of the cushion, this has been known to cause severe wear of the inner tread/sidewall of tyres where the car is driven over them regularly.
The wear pattern is similar that that on your pictures.
These are speed 'humps' which do not cover the full width of the road, but are in each cariageway and are champfered at the sides, a bit like a short pyramid shape with a flat top.
The track width of many cars is such that they can drive over these and only the inside edges of the tyres ride over the raised angeld sides of the cushion, this has been known to cause severe wear of the inner tread/sidewall of tyres where the car is driven over them regularly.
The wear pattern is similar that that on your pictures.
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Originally Posted by pjinca' post='1044551' date='Nov 1 2009, 04:37 AM
It not an alignment problem Scott, my rears were much more cambered inward when I had the 125's on there than the 172's. the 172's seem to flatten out the negative camber much better than other wheels. With the 125's the negative camber was VERY noticeable, with the 172's? Barely perceptible.
Hmm, maybe this is another reason to keep your 172s.
