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 Ask my anything about tires, I am a tire engineer

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TSepjx31
post Jul 25 2022, 08:40 PM

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QUOTE(codenchips @ Jul 25 2022, 06:39 PM)
In the market for new tires. Recently discovered PS4S. Should I for PS4S or PS5? What would be the main differences?
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I did a detail comparison here

Hopefully it helps biggrin.gif
TSepjx31
post Jul 25 2022, 08:49 PM

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QUOTE(matkewl @ Jul 25 2022, 03:10 PM)
bro i am using a subaru forester mileage only 28k but the side of the tires already makan and the middle thread is almost 50%. what could be the reason?

i rotate tires every 10k mileage.
tire size is 225/55/r18 current one is bridgestone
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Hello, when you say makan do you mean there is no more tread depth? (1.6mm) ? Would be nice if you can either take a picture or measure the tread depth in all sides (shoulder center shoulder)

When I look into Subaru Forester, it seems that it is a AWD configuration. Do let me know if this is the same for your car. If its a AWD setup, rotating your tires does help at all. For your shoulder wear issues, this is quite common in SUV configuration but not as extreme as you said (1.6mm on shoulder and still have 50% in the center) So you might want to check your car camber setup to see if anything is wrong.

A detailed analysis can be done if you provide more data thumbsup.gif

TSepjx31
post Jul 25 2022, 08:50 PM

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QUOTE(zoixc @ Jul 24 2022, 03:48 AM)
i been putting one psi higher then stock psi, so far couldn’t feel any difference la.

how to say is the right balance haha
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When you dont feell anything at all then balance is right smile.gif
jimmyteng18
post Jul 25 2022, 08:57 PM

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QUOTE(epjx31 @ Jul 25 2022, 08:35 PM)
1). Can I buy a different brand/model tire?
---> For sure you can buy another brand. Its a free market. You do not have to stick with the OE tires.

2). New tire should fit at Front or Rear?
---> There is 2 main points when it comes to this.
1st: Putting new tires on the rear would be beneficial especially during aquaplaning situation. Your higher tread depth would allow you a higher slip speed compare to the front tires. Also if you have an emergency with your lower tread depth tires in the front, you can steer them. For safety reasons you should always place the new tires in the rear

2nd: Putting new tires on the front make sense from a wear point of view. As you are most likely driving in a front wheel mode for your Tiguan, this would mean that your front tires will wear faster and balance your wear rate in the rear at one point which allows your to prolong your time till the next tire change.

So based on these 2 points, you should balance between your requirements. If you do travel > 80 km/h during rainy days with big water patches you should fit it on your rear. Of course you can always drive slower and avoid aquaplaning and set your new tires to your front to have more "value"


3). Any recommendation of tire good for dry and wet? Hopefully can match MC6's performances.

Michelin Primacy 4st 235/50R18 730
Continental UC6 235/50R18 540
Kumho Ecsta PS31 235/50R18 468
Continental Max Contact 6 235/50R18 550
Yokohama Advan Fleva V701 235/50R18 538

I had a quick look on my price table and the above are some of them options. MC6 is one of the best in wet but if you are looking for something better, I would recommend Primacy 4st. You can check out the head to head comparison here

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Bro, thanks for the reply. Appreciate it.

FYI, Tiguan 4Motion is all time 4 wheel drive. Hence, new tyre should be at the rear, right?
TSepjx31
post Jul 25 2022, 11:20 PM

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QUOTE(jimmyteng18 @ Jul 25 2022, 08:57 PM)
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With a 4 wheel drive configuration, yes Its a no brainer. Put the new tires on the rear.

This post has been edited by epjx31: Jul 25 2022, 11:21 PM
zoixc
post Jul 25 2022, 11:25 PM

haha
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QUOTE(epjx31 @ Jul 25 2022, 08:50 PM)
When you dont feell anything at all then balance is right smile.gif
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i recently switch the rear and front tyre around, same psi as before but can feel the steering vibrating a lot anything above 120km h.
i'm assuming i need to do the balancing of my tires again ?
TSepjx31
post Jul 26 2022, 12:00 AM

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QUOTE(zoixc @ Jul 25 2022, 11:25 PM)
i recently switch the rear and front tyre around, same psi as before but can feel the steering vibrating a lot anything above 120km h.
i'm assuming i need to do the balancing of my tires again ?
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When you rotate, did you not balance it?

Steering vibration could mean a lot of other things but since you rotate it just before might be worth to check it out.
zoixc
post Jul 26 2022, 07:44 PM

haha
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QUOTE(epjx31 @ Jul 26 2022, 12:00 AM)
When you rotate, did you not balance it?

Steering vibration could mean a lot of other things but since you rotate it just before might be worth to check it out.
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no, didn’t balance as the tyre shop told me if no vibration then no need to do balancing
cYus
post Jul 26 2022, 07:48 PM

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We have a beater Saga on 14' for staff attending on-site calls. Is it true there are no good grippy tires for the standard 14" wheel? Seems like they start at 15".
littlefire
post Jul 27 2022, 09:06 AM

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QUOTE(epjx31 @ Jul 26 2022, 12:20 AM)
With a 4 wheel drive configuration, yes Its a no brainer. Put the new tires on the rear.
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If 4 wheel drive or AWD you need balance tire treads to prevent early failure/wear of differential.
If the old & new 1 got wide tire tread thickness difference it may impact vehicle performance.
It is recommend to change all 4 tires and not just 2 new tires to the rear.

https://www.dunntire.com/blog/Tire-Replacem...nd-AWD-Vehicles

In fact, studies have shown that differences of just 2/32 of an inch in tire tread between tires on the same vehicle can impact vehicle performance. For example, if you were to replace just two tires on your AWD or 4WD vehicle, you would have a slightly larger diameter on the new tires, due to deeper tread. A small difference in the front and back tire diameter means the two axles are always turning at different speeds, even if the car is going straight down a highway. This is contrary to how the vehicle was designed to operate and will likely lead to early malfunction.

For all AWD/4WD system car or pickup the manual book always list to rotate the tires frequently and change all 4 at once. It is not recommended to just change either front or rear or just 1 pcs due to the reasons above.

The only way for owner to change only 2 tires is do tyre shaving by reducing the new tyre tread thickness to match the other 2 older tyre thickness or diameter, but this method is not common nowadays in Malaysia and consider a waste for new tyre. Only those old shop which do tyre celup in the past may still got these machine available, but newer shop a lot of them did not even knew about this method.

https://www.tyres.net/blog/entertainment/th...of-tyre-shaving

This post has been edited by littlefire: Jul 27 2022, 01:46 PM
littlefire
post Jul 27 2022, 09:33 AM

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QUOTE(zoixc @ Jul 26 2022, 08:44 PM)
no, didn’t balance as the tyre shop told me if no vibration then no need to do balancing
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When rotate it is better to at least do balancing for the front tires first, everytime i do rotate i will ask to check or do balancing for the front the cost is not much some only RM5~10/pcs.
zoixc
post Jul 27 2022, 09:44 AM

haha
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QUOTE(littlefire @ Jul 27 2022, 09:33 AM)
When rotate it is better to at least do balancing for the front tires first, everytime i do rotate i will ask to check or do balancing for the front the cost is not much some only RM5~10/pcs.
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oh i see, then i will get it balance this weekend before the long drive next week haha

thanks for the info
yongchin89
post Jul 27 2022, 09:48 AM

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how many year a tyre can be use on road? been using xm2 for around 5 years but tread is still above the safety indicator
littlefire
post Jul 27 2022, 10:27 AM

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QUOTE(yongchin89 @ Jul 27 2022, 10:48 AM)
how many year a tyre can be use on road? been using xm2 for around 5 years but tread is still above the safety indicator
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https://www.michelin.com.my/auto/tips-and-a...ge-my-car-tyres
ktek
post Jul 27 2022, 10:45 AM

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QUOTE(cYus @ Jul 26 2022, 07:48 PM)
We have a beater Saga on 14' for staff attending on-site calls. Is it true there are no good grippy tires for the standard 14" wheel? Seems like they start at 15".
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long ago i suka bs turanza 13" and 14"
not sure recent produce size for them or not
littlefire
post Jul 27 2022, 10:51 AM

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QUOTE(ktek @ Jul 27 2022, 11:45 AM)
long ago i suka bs turanza 13" and 14"
not sure recent produce size for them or not
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turanza also normal comfort base tires, the real performance stuff is the Potenza series.

If want sporty types tires for smaller size can try get Maxxis or special order Yokohama/Toyo tires from Japan.
If not mistaken i got friend using Yokohama Advan series for 14" kelisa, heard the price not cheap almost 2xx/pcs.
ktek
post Jul 27 2022, 03:29 PM

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QUOTE(littlefire @ Jul 27 2022, 10:51 AM)
turanza also normal comfort base tires, the real performance stuff is the Potenza series.

If want sporty types tires for smaller size can try get Maxxis or special order Yokohama/Toyo tires from Japan.
If not mistaken i got friend using Yokohama Advan series for 14" kelisa, heard the price not cheap almost 2xx/pcs.
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yeameh. turanza wet & dry grip is much better than potenza s001 u know.
advan fleva must avoid.
littlefire
post Jul 27 2022, 05:01 PM

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QUOTE(ktek @ Jul 27 2022, 04:29 PM)
yeameh. turanza wet & dry grip is much better than potenza s001 u know.
advan fleva must avoid.
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Some potenza series are consider semi-slick or summer max performance tires, if you get those tires usually sucks in wet but during hot day the grip is damn good. If you open your window can hear those sand sticking to the tires on hot weather, better dont use it during wet condition.
amscouzach57
post Jul 28 2022, 08:41 AM

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Can you share with us the basics of tire thread patterns which contributes to what performance criteria?

Especially, aquaplanning, dry grip, wet grip, road noise.
MazeLoL
post Jul 28 2022, 11:54 AM

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Hi , TS what do you think about Falken FK510 for 215/45/R17 as im currently on RE004 and it kinda noisy especially near end of their life, it last me 50k Km

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