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Ask my anything about tires, I am a tire engineer
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terratoss
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 Aug 28 2023, 01:09 AM
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New Member
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Hi to all, I got question to ask the tyre experts here.
My tyres bought on 2/10/21. When balancing, mechanic said can see tyre threads are not rotating straight. When tyres on balancing machine spinning, you can see the threads forming a wavy, left right pattern. Out of 4 tyres, 3 tyres showing certain degree of the wavy pattern. Mechanic also said 1 of the tyres not round anymore, slightly off shape but the feel of his hands and also mentioned no point balancing the tyres at current condition. Tyres also showing hairline cracks on the sidewall.
Are the above signs of issue with tyres or just something normal? I'm not sure if mechanic is falsely diagnosing the tyres?
I did went back to original tyre shop to ask seller how come tyres are like that. Not sure if they are pulling a fast one? They said the wavy pattern and hairline cracks are normal which also happen on other well known brand like michelin, bridgestone, etc. They also said if tyre really as mentioned, he wont be able to balance the tyres which he could balance it on his machine.
This post has been edited by terratoss: Aug 28 2023, 01:10 AM
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terratoss
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Aug 29 2023, 09:55 AM
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New Member
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QUOTE(amscouzach57 @ Aug 28 2023, 09:00 AM) Posting some pictures would add more clarity to your questions. for the wavy thread pattern on balancing machine i dont have the video. cracks on tyre side wall surface I can try to take some pics later. |
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terratoss
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Aug 29 2023, 09:59 AM
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New Member
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QUOTE(mdziaf @ Aug 28 2023, 05:39 PM) This is gonna be a tough one this. Usually if a tire cannot be balanced, then its a uniformity issue - which for new tires, the tire shop shouldnt sell to you and instead sent the tire back for a warranty claim. But in your particular case, the tire is almost 2 years old now. So it might be a bit difficult to get a warranty claim from the manufacturer, but you could try nonetheless. The proper action is to go back to the original shop and ask them to balance the tire. If they can't, then ask if they can submit a warranty claim. But you will need to get a replacement tire if you do this. The reason why I say it might be difficult to get a claim is: 1. the tire is already 2 years old 2. the issue may not be manufacturing but coming from day to day use In any case, you mentioned that the 1st shop didn't do any balancing on that tire. What about the original tire shop? Did they balance the tire? If they didnt, then do you notice any vibration when you are driving? If you do not notice any vibration, the tire is "balanced" enough that you don't really need to be concerned. Original tyre shop balanced all 4 tyres for me. All can be balanced supposedly as I seen on their machine. But im not sure if other brands do have this phenomenon? So far no vibration while at around 110km/h. |
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terratoss
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Aug 30 2023, 01:28 PM
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New Member
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QUOTE(mdziaf @ Aug 29 2023, 01:12 PM) In that case i dont think there is any issue with your tire. Most likely the shop that said your tire has issue is trying to get you to change tire based on how the tire looks i.e. wavy, got crack etc. Myabe. But that mechanic did not push any tyres to me. So i wonder if he is baiting me instead?  There is something unusual about my tyres previously. When driving 70km/h n above for stretch of road, be it straight or a long bend for e.g 100m, my steering will become rigid/stuck, need to use some strength then can steer freely again. After a rotation, problem seems to be gone.  |
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