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7 Series - F01 / F02 (2009 - current)
The new re-designed 7 series F01 / F02 leads off the BMW Fxx chassis code!

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  #1  
Old 07-22-2014, 08:37 AM
chrischeung chrischeung is offline
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Continental DW excessive wear

I've run 20 minutes in autocross driving, 20 laps, 1 minute each, and noticed the outside front tire having excessive wear. See the picture attached.

The missing chunks, is uniform across the entire circumference of the tire. Also if you look closely at the middle rib, the angles cuts for water channeling are all gone.

Any thoughts?
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Last edited by chrischeung; 07-22-2014 at 06:49 PM.
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  #2  
Old 07-22-2014, 10:24 AM
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1bad540 1bad540 is offline
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Yea you took an all season tire and autocrossed it for something it was never meant to do, what did you think was going to happen?
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  #3  
Old 07-22-2014, 11:13 AM
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Road debris during the event?
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  #4  
Old 07-22-2014, 12:37 PM
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csmeance csmeance is offline
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road debris can cause some chunks to come off but the tire shouldn't be integrating. What PSI were they at? I had a set of DW's on the front of my E65 for 30K miles when I had new tension struts and 100% perfect alignment. Bad tension strut bushings can cause irregular wear on the outside edge and some play in the steering. In addition, a slightly off alignment can compound the irregular. Under extreme conditions the tire might do that but you should contact the place where you got the tires and see if they can do a warranty replacement.
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Last edited by csmeance; 07-22-2014 at 12:40 PM.
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  #5  
Old 07-22-2014, 01:09 PM
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Warranty should replace that issue.


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Old 07-22-2014, 01:11 PM
Rdsii Rdsii is offline
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heat friction stress.. 5000 pound car at the track..

a friend of my took his s4 to the track with new tires. he chewed them up. you need to get a set of performance tires used not brand new..
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Old 07-22-2014, 01:38 PM
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Quote:
Originally Posted by 1bad540 View Post
Yea you took an all season tire and autocrossed it for something it was never meant to do, what did you think was going to happen?

True dat.


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Old 07-22-2014, 01:39 PM
Ram750 Ram750 is offline
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Perhaps next time you track it, some better "track-suited" tires might be something to consider.


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Old 07-22-2014, 03:57 PM
ayu910 ayu910 is offline
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Continental DW should be fine for track, like other member mention what is the psi? low psi will cause too much load on both edges which add unnecessary stress. Also, check for date code on the tire and oxidation of old rubber could be the factor. Old rubber + TX heat not a good combination.

Full track day at Laguna and the DW looks fine
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Old 07-22-2014, 06:35 PM
chrischeung chrischeung is offline
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DW is not an all season tire. It's a summer ultra high performance tire. http://www.continentaltire.com/www/t...act_dw_en.html

I was running around 39-40 PSI, which is over the 38 PSI (from memory - it was definitely a few PSI above but below max PSI). The temperature was not that hot, around 80 ambient, but the surface was a little rough - no one else had problems. Tires were put on about 6 months ago, but dated 0812 (8th week of 2012). I just noticed it recently. For all I know, it may have occurred on the road.
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3/12 ED 7 - thread ID 610350
1/11 ED 6 - thread ID 5767556&postcount=175
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Last edited by chrischeung; 07-22-2014 at 06:50 PM.
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  #11  
Old 07-22-2014, 06:50 PM
ayu910 ayu910 is offline
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psi looks ok, date code little far out but should be fine (I got the DW Oct/13 and date code is 18th week of 2013). You should claim warranty, maybe the tire shop didn't store the tire correctly. A lots of thing can happen in 24mo of storage like accidentally expose to the sun for too long.
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  #12  
Old 07-22-2014, 07:19 PM
chrischeung chrischeung is offline
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Quote:
Originally Posted by rajeek View Post
Warranty should replace that issue.
I'm taking this advice. Thanks.
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3/12 ED 7 - thread ID 610350
1/11 ED 6 - thread ID 5767556&postcount=175
4/10 ED 5 - thread ID 453501
5/08 ED 4 - thread ID 290679
3/07 ED 3 - thread ID 201013
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  #13  
Old 07-23-2014, 11:27 AM
chrischeung chrischeung is offline
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Went to Discount Tire, they said the tires were "abused", as if on a track. So warranty wouldn't cover. But as a one time goodwill gesture, they offered 40% off a replacement tire ($110 for a $186 tire, give or take). They did say the current tire is drivable.

I'm thinking I just drive the current tire until my lease ends in about 10 months. I don't want to get into the tire management/storage business just for $75.
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2012 ActiveHybrid 750i ED

3/12 ED 7 - thread ID 610350
1/11 ED 6 - thread ID 5767556&postcount=175
4/10 ED 5 - thread ID 453501
5/08 ED 4 - thread ID 290679
3/07 ED 3 - thread ID 201013
3/06 ED 2 - thread ID 136454
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  #14  
Old 07-23-2014, 01:13 PM
aom aom is offline
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They'll just ding you on the lease return in 10 months (as they'll take a look at the tires for uneven wear, wear level, etc).

EDIT: Though I suppose if you'll be leasing another BMW, they can work something out.
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Old 07-23-2014, 02:01 PM
chrischeung chrischeung is offline
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Quote:
Originally Posted by aom View Post
They'll just ding you on the lease return in 10 months (as they'll take a look at the tires for uneven wear, wear level, etc).
I have the original RFTs in storage that I will swap in.
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1/11 ED 6 - thread ID 5767556&postcount=175
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Old 07-23-2014, 02:26 PM
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In that case (and if they say it's safe to use), then yeah, why bother getting new ones (unless you want to track again)?

For me though, since it's just a small sliver of a contact patch that makes the difference between a ditch and a road, I'm pretty OCD about my tires so I'd personally replace them, or put back the RFT.
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