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      10-19-2014, 10:40 PM   #1
xXSupa
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Questions Regarding Tires

I noticed that one of my tires are bald (Driver side, front). I'm not very experienced with tires and stuff, so I have a few questions that I wanted to ask.

Car: 2011 BMW X5, xDrive, 35i

1. If I were to change the bald tire, would I need to change the passenger side, front tire as well? There is still tread left on that one (About 40%)

2. Should I consider changing to a non-run flat tire?

3. What tire(s) would you recommend?

Thanks in advanced for any input!
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      10-19-2014, 11:36 PM   #2
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Quote:
Originally Posted by xXSupa View Post
I noticed that one of my tires are bald (Driver side, front). I'm not very experienced with tires and stuff, so I have a few questions that I wanted to ask.

Car: 2011 BMW X5, xDrive, 35i

1. If I were to change the bald tire, would I need to change the passenger side, front tire as well? There is still tread left on that one (About 40%)

2. Should I consider changing to a non-run flat tire?

3. What tire(s) would you recommend?

Thanks in advanced for any input!
1 - you wouldn't need to change the front passenger tire, but if it were me I definitely would. I like to keep all my tires the same brand/model with same tread life remaining. Not to mention, you'll always be buying tires if they're all mis-matched with different tread amounts left.

2 - personal preference on run flats. Most people here seem to go away from them once the originals wear out. My X5 has them but once they wear out I'll be going a different route.

3 - personal preference once again. The Conti DWS seem to be a popular choice around here.
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      10-20-2014, 06:45 AM   #3
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Quote:
Originally Posted by xXSupa View Post
I noticed that one of my tires are bald (Driver side, front)
How did you do that? Do you use the car for drifting?
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      10-20-2014, 07:47 AM   #4
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I would also have the alignment checked.
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      10-20-2014, 08:52 AM   #5
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On my wife's Explorer, three of the tires are brand new and one is "older". Discount Tire replaced three of them due to nails, and the fourth one didn't have anything wrong with it. So in a similar situation. Absolutely nothing wrong with that, apart from the fact that you'll always be changing one tire before all the others.

You can consider non-RFT tires, but don't get one and have the others be RFT. I'd at least keep all four tires the sand brand and model.

I personally do not have a problem with RFT tires. Besides, my wife drives it and I'd hate for her to get stranded.
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      10-20-2014, 02:53 PM   #6
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I haven't had the alignment checked by a shop yet, but from everyday driving, the alignment seems to be fine. I will definitely get it checked when I replace the tire though.

I lend the car to my dad and he went on a 9000km business trip from Vancouver to Manitoba, then back. When we got the car back, one tire was bald... No idea what happened. He claims he didn't do anything
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      10-20-2014, 03:51 PM   #7
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On a full time AWD vehicle, best practice is to replace all four tires. Even with a RWD or FWD car, you should be replacing that axle's tires in pairs.

On an X5, front camber is not adjustable without swapping parts, and only in fixed +0.5, 0.0, and -0.5 increments. Toe is adjustable. The camber adjustment is usually done when something is bent in an accident.

BMW has a measurement of allowable difference in outer circumference of tiers between front and rear. Perhaps the owners manual will state this? Or you can call your dealer and ask.

Since you would be buying a new pair up front, you would find that measurement, and compare to your existing rear tires, and see if it's within spec. You could shave the new fronts to match the old rears, effectively killing the potential longevity of those new tires, only to replace all four at the same time... Sooner than anticipated.

So that best practice would say, you should be replacing all 4 tires, and getting an alignment with that to identify why. If it's the inner side of the tire, it's either negative camber or toe out on that wheel. Or toe-out/positive camber if the outter tire. You can even get scalloping with bad toe. Camber issues may mean a larger issue at hand. Normally it takes a lot of camber to wear a tire, e.g. 2+ degrees. I'm going to go with toe if anything.

Some folks will say that their dealer said to over inflate your tires since camber is not adjustable, that only solves the issue of sidewall flex and outer edge tire wear. It's a band-aid not a fix.

So yeah... There you go, a few options, discuss with a professional the pros and cons of that.
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      10-20-2014, 04:59 PM   #8
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Your toe is in or the alignment is bad. If you take your X into a alignment shop with these tires on the car they will instantly be able to tell you your issue
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      10-21-2014, 01:45 PM   #9
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+ 1 to all those who mentioned having alignment/toe checked.
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