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Rear wear?

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Busterboo
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Rear wear?

Post by Busterboo » Thu Jul 14, 2022 10:45 pm

How much more than your fronts do your rears wear? :o

Measured mine today. Fronts 5mm, rears 2mm.
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buzyg
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Rear wear?

Post by buzyg » Fri Jul 15, 2022 1:58 am

Used to get through two pair of rears for each pair of fronts. Not so sure these days. I don't drive the Zed that far each year and can't remember what I did yesterday. :lol:
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Rear wear?

Post by Marcoose » Fri Jul 15, 2022 5:04 am

I don’t use my rear much. All the use is in the front. No wear whatsoever that I can tell.
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sw4nny
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Rear wear?

Post by sw4nny » Fri Jul 15, 2022 7:48 am

Marcoose wrote: Fri Jul 15, 2022 5:04 am I don’t use my rear much. All the use is in the front. No wear whatsoever that I can tell.
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Rear wear?

Post by Rucky » Fri Jul 15, 2022 6:21 pm

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2pairs rears to one pair of fronts - twice over 2 cars.
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B21
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Rear wear?

Post by B21 » Fri Jul 15, 2022 6:39 pm

300 BHP E89 20i and 400 BHP E89 35is

Pretty close to 2 sets of rears to one set of fronts.. :driving:

If the fronts are wearing slower than that then you ain’t turning n braking enough… :tumbleweed: :thumbsup:
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Rear wear?

Post by mcbutler » Sat Jul 16, 2022 6:38 pm

cruise uses the rear brakes to slow you on hill descents once the engine braking is insufficient which will add to rear wear
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Rear wear?

Post by zxy » Mon Jul 18, 2022 1:34 pm

The alignment spec for the rears is for quite a bit of negative camber. The inner 1/4 of the rear tires will wear out rather quickly. My Indy agreed and reduced the camber down to just under the minimum spec. Car still feels the same and cornering is still fine. Tire wear with the fronts has equalized. Very hard cornering has probably been compromised but I do not mind in fact I wish the rear and front were the same size, for less understeer and the ability to rotate them.
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Rear wear?

Post by B21 » Mon Jul 18, 2022 3:59 pm

zxy wrote: Mon Jul 18, 2022 1:34 pm The alignment spec for the rears is for quite a bit of negative camber. The inner 1/4 of the rear tires will wear out rather quickly. My Indy agreed and reduced the camber down to just under the minimum spec. Car still feels the same and cornering is still fine. Tire wear with the fronts has equalized. Very hard cornering has probably been compromised but I do not mind in fact I wish the rear and front were the same size, for less understeer and the ability to rotate them.
Folks talk about excess camber and inside tyre wear..I've (so far) kept stock alignment and gone through 7 sets of rears on E89s and I've never had any marked inner tyre wear..FWIW.. :thumbsup:
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Rear wear?

Post by Rucky » Mon Jul 18, 2022 4:20 pm

I had new tyres and 4 wheel alignment, not seen inner shoulder wear on either of2 cars and current rears are even wear across tread width.

I do know that straddling road humps / speed. Cushions wears the inner shoulders badly
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Rear wear?

Post by Busterboo » Mon Jul 18, 2022 11:57 pm

B21 wrote: Mon Jul 18, 2022 3:59 pm I've never had any marked inner tyre wear..FWIW.. :thumbsup:
Ditto.
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Argyll Andy
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Rear wear?

Post by Argyll Andy » Tue Jul 19, 2022 12:14 am

Busterboo wrote: Mon Jul 18, 2022 11:57 pm
B21 wrote: Mon Jul 18, 2022 3:59 pm I've never had any marked inner tyre wear..FWIW.. :thumbsup:
Ditto.
I know it’s a G29 but I checked all my tyres today as I thought I may need rears soon.

Slight error in judgment on my part, needs all four replaced, fronts just over 2mm rears 1.8mm so quite impressed there’s equal wear across all tyres. Fronts and rears wearing at approx the same rate, bad news is only 7.5k miles on them and the first 1200 was done at a very sedate rate running the car in. No slides, doughnuts etc, just forum runs and weekends away :driving:

Replacement like for like circa £1k :o looking at replacing all with Conti 7’s as they’re winning the major tyre tests. A mere snip at £750 :lol:

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    Rear wear?

    Post by Scubaregs » Tue Jul 19, 2022 10:13 am

    Replaced rears about 8 months ago, still a bit of tread on them but a bad puncture meant I just changed both. Fronts have loads left on them so I'm thinking they have been changed before as car is now on 21K.

    Get under 4,000 miles on the rear tyre on the bike though.
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    Argyll Andy
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    Rear wear?

    Post by Argyll Andy » Tue Jul 19, 2022 11:23 am

    Scubaregs wrote: Tue Jul 19, 2022 10:13 am Get under 4,000 miles on the rear tyre on the bike though.
    That’s because the front’s only on the ground half the time :rofl:

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      enuff_zed
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      Rear wear?

      Post by enuff_zed » Tue Jul 19, 2022 11:35 am

      Wifey's 2.5i auto came with Landsails fitted. I always said I'd change them when we refurbed the wheels. Until last week she thought they were fine but then she drove the 'Freeleeta' with Pirellis on!
      On the plus side, as far as I can ascertain, Landsails actually grow tread the more you use them. :rofl:
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