You need to replace your tires. A buldge is an indicator that the carcass has a tear. Since the carcass is what carries the load of the tire its best to change your tires.

Curious tho what tire you are using? Not often to see a UNECE R117 marked tires made in Malaysia unless its a new tire you got with the car from the factory.

Just to add on to this: there are tolerances for how much indentation is allowed. Although structurally fine and safe, if noticed by the consumer, it will cause undue concerns by the end user - such as what has happened to you Vsmh. Usually these indentation falls under QC issues, and would be grounds for claims. But each manufacturers have different requirements for what is allowed and what is not, so your mileage will vary. You could try to go to a different dealer to see if they would be willing to submit a complaint on your behalf. But if your tires have already been used, don’t expect a 1-to-1 replacement.

Well i can only give a general idea of it from my experience and to cover my butt incase i give too many details.

Imagine welding two pieces of iron together. If you put too much weld material you end up with two pieces that have a big buldge at the connecting point. If you put too little you have a joint that curves inwards on itself. And if you put just the right amount it will be almost perfect (smooth to the touch but if you zoom in closer it may still be too little or too much). The same can be said with the joining of rubber materials. And hence why there must be some QC checks to make sure its not going to be an issue - both in terms of safety and in terms of customer complaints.

To be honest I doubt you will find any online resources because these would be very company specific.

Yea in your case Silverstone has closed down and replaced by Toyo. Maybe the buldge we are talking about are different type of buldge - since you seem to imply that 3 of your tires that came with your car has this issue. To me that doesnt seem to be very likely. Tires going to a car manufacturer would need to pass through the tire manufacturer’s QC and then again through the car manufacturer’s receiving QC department before again another round of QC before the car leaves the car factory. So maybe thats why you arent gettng anywhere with your request.

More info here:
https://www.tyrepress.com/2021/02/toyo-clos...nt-in-malaysia/

Short answer: it depends

Long answer: your question is like asking how fast can an engine go?

For the case of the engine it depends on how much power the engine can output, the gear ratio of the gearbox, the size of the tire on the car, the aerodynamics of the car body etc.

For the case of a tire it depends on the weight of the car, the turning angle of the corner, the compound used in the tire, the suspension setup, the road condition etc. Change one thing and it will effect the speed you can take the corner.

But if driving on public roads, keep to the speed limit and drive sensibly. If wet then drive cautiously, because you dont want to be at the limit of grip around a corner only to realize you need to avoid an obstacle etc.

You do know that tire squealing isn't a sign that you are at the limit of grip but more indicative of improper input from the driver when taking a corner and/or bad car alignment and/or under inflated tires.

If the tires are worn down, then yes the tire can start to squeal if you are asking similar lateral G performance from the tire like when it was new. But since you were asking for brand new tire performance this doesn't apply.

So again you might think you are doing things safely since no one is around, but bad alignment/improper inflation can lead to sudden loss of control. If you really want to test your car do it on the track.

Just to add so that it answers your question directly:

The number indicates how much of that material is present. There are two places where this is checked and labelled:
1. The tread counts the number of material if you cut through the tire directly in the middle
2. The sidewall counts the number of material as you cut through the sidewall

So for example:
Tread: 1 polyester + 2 steel + 2 nylon
Sidewall 2 polyester


This means that there is 1 polyester body ply at the middle of the tire followed by 2 layers of steel belts and finally 2 layers of nylon cap material that is present at the center of the tire (from bottom to top)

At the sidewall there is 2 layers of body ply material. In this case it is the same ply material that is found at the center but wrapped around by the bead and runs up the sidewall.

Different tires will have different combination of body ply, and nylon cap depending on its speed rating and required performances. All car tires will have 2 layers of steel belts.

Yes I wouldn't expect them to publish because even if the same tire size e.g. 185/55R15 under the same company - the tire construction will vary depending on again the speed symbol of the tire and the performances required. The best combination is actually the one that is on the actual tire as that combination has been tested and will meet all the regulatory and safety requirements set by the company and by the law.

It is not possible to say which is better just by comparing the number of polyester/steel/nylon written on the tire. So please don't try to look into these numbers too much. They are there mainly for legal purposes.

And just to give you an idea as to why it is not possible - There a multiple variations of polyester body ply that is used in a tire by a single manufacturer and each manufacturer uses their own variation. So even if you have two tires stating that they have 1 polyester body ply like your example, I cannot tell you which is better because i do not know what type of polyester are the using. The same goes for the steel belt material and the nylon cap.

Yes it has a harder sidewall but that white bit is already the carcass of the tire. There is a real risk of total tire burst if anything cuts the carcass.

What your tyreman said is what epjx31 replied:

The high pressure your tyreman mentioned is the air pressure in the tires (which is higher than ambient air pressure). A sudden loss of pressure is what is most concerning in your case.

Feel free to still use it. There's plenty of thread depth remaining (1.6mm is the minimum legal requirement). Changing at 2mm is also a good practice during the rainy season.

With regards to the shoulder looking like it is, this is not a cause of concern. Just the rubber aging.

1 and 2 answered above


3 - shopee dan lazada is cheaper

My former company did provide staff discounts, but its rarely utilized. Like I said, you can get better deal on Shopee and Lazada compared to the staff discounts

Not to derail the thread but insider trading is only for securities not for items sold by the company

At least in my experience i didnt have to pay anything. Just showed them my purchase history in the app and they did the work. No additional charges. Klang valley shop.

Just a friendly reminder that the UTQG isnt comparible between brands ya. 280 treadwear on a Michelin doesn't mean that it will wear out similar to a 280 on a Goodyear/Conti/Hankook etc.

UTQG is a self certification type. This means that any manufacturer can declare whatever value they want as long as the TIRES WITHIN IT BRAND performs in line with what they have defined on a standard test track (example provided below). UTQG grading is govern by the US Department of Transport.

Example;
Let say tire manufacturer A has 4 tire lines name J, K, L & M and that, each is assigned a UTQG treadwear value of 100 200 300 and 400. As long as the results from the manufacturers' testing show thats M last 4 times longer than J (since M has 400, J is 100), L last 3 times longer than J, and K last 2 times longer than J, they grading is considered correct. All Manufacturer A has to do is to show the test results if the Department of Transport asks. Lets say tire line J achieves 40,000km in the treadwear test.

If Manufacturer B comes and does the same (and have the same rating for their tires J K L and M as A), but for thier tire J their results they got 20,000km. Their rating of 100, 200, 300 and 400 is still valid. Because between the tires within their brand their relative performance is reflective of their grade.

So in other words, you cannot compare the values of a treadwear rating between manufacturers.


Your comment about how the car is driven is still correct and will effect how long the tires will last.

Edit: just to make it clear, from the example: Manufacturer A's tire J has 100 Treadwear rating and lasts 40,000km on a standard test track, but it will perform similar to Manufacturer's B's Tire K that has 200 treadwear rating. All this because there is no standard reference in the UTQG treadwear rating, only relative performance within the respective tire manufacturer. Hence why its meaningless to compare treadwear rating between manufacturers.

This post has been edited by mdziaf: Mar 2 2023, 10:47 AM

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.

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.