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 Ask my anything about tires, I am a tire engineer

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zoixc
post Jan 9 2023, 11:43 PM

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hi sifus, was wondering if its okay to change the front 2 tyre first and change the rear one later on ?

ktek
post Jan 9 2023, 11:47 PM

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QUOTE(showcase @ Jan 9 2023, 03:57 PM)
thank you for the answer. it seems I hv to work harder to get all 4 tyres changed together to the same size to avoid any complications. thank you.
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last week i just bought 2022 used tyre from civic fe cost below 1k
quite a good deal u should try survey 4pcs

btw i purposely use smaller profile in order to lower car height as much as 2"
feel good

This post has been edited by ktek: Jan 9 2023, 11:50 PM
ktek
post Jan 9 2023, 11:48 PM

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QUOTE(zoixc @ Jan 9 2023, 11:43 PM)
hi sifus, was wondering if its okay to change the front 2 tyre first and change the rear one later on ?
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2pcs is fine. front or back depend ur familiarity with car
amscouzach57
post Jan 10 2023, 07:59 AM

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QUOTE(zoixc @ Jan 9 2023, 11:43 PM)
hi sifus, was wondering if its okay to change the front 2 tyre first and change the rear one later on ?
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If your wheel setup is not staggered, put the 2 new tyres at the rear, & bring the old rear tyres to the front.
kiTZss
post Jan 10 2023, 11:07 AM

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What's the lifespan of the tyre ? My 2 rear tyres from 2016 until now, front tyres from 2018 till now, still ok to use ? Thread still alot
TSepjx31
post Jan 10 2023, 02:58 PM

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QUOTE(matkewl @ Jan 9 2023, 04:18 PM)
hi , is rovelo 225/55/18 is a good buy? its made in china. Montare HT RV
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Would really stay away from china tires. They do not provide value. They might bin good in one performance criteria but performs extremely bad in the other. Low target conflict management.
ktek
post Jan 10 2023, 10:54 PM

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QUOTE(kiTZss @ Jan 10 2023, 11:07 AM)
What's the lifespan of the tyre ? My 2 rear tyres from 2016 until now, front tyres from 2018 till now, still ok to use ? Thread still alot
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common ppl say 1460 days. tapi mine going botak soon every 730 day
ktek
post Jan 10 2023, 10:55 PM

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QUOTE(epjx31 @ Jan 10 2023, 02:58 PM)
Would really stay away from china tires. They do not provide value. They might bin good in one performance criteria but performs extremely bad in the other. Low target conflict management.
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TQ. is rim balancing (adding weight pieces) must match with each tyre installed.
GuyM
post Jan 11 2023, 08:03 AM

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QUOTE(zstan @ Jan 3 2023, 03:16 PM)
My car shaking whenever i drive over 110km/h. checked with t ire people they say no balancing and alignment issue.

previously  no  such  issue when using Toyo tires. now using Weslake tires.  so not sure if cheaper tires is the cause?

havent checked  suspension yet.
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Had same issue found out the drive shaft was the culprit, issue resolved after changing both sides
White2000
post Jan 11 2023, 10:38 AM

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Anyone knows what this means? NG condition? RR 1mm means no longer enough?
zstan
post Jan 11 2023, 11:35 AM

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QUOTE(GuyM @ Jan 11 2023, 08:03 AM)
Had same issue found out the drive shaft was the culprit, issue resolved after changing both sides
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thanks for the tip. just googled the symptoms of drive shaft failure. feels like my car problem

A common symptom of a failing driveshaft is an intense shaking coming from underneath the vehicle. Worn out u-joints, couplers or carrier bearings can cause the driveshaft to vibrate. If you don’t get these components serviced, it can lead to further damage to other drivetrain components.
kennykck
post Jan 11 2023, 12:17 PM

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QUOTE(White2000 @ Jan 11 2023, 10:38 AM)
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Anyone knows what this means? NG condition? RR 1mm means no longer enough?
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Minimum is 1.6mm then need to change. Yours is asking to go heaven earlier. Somemore is 6 years old, rubber maybe harden and crack easily
zoixc
post Jan 11 2023, 11:59 PM

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QUOTE(ktek @ Jan 9 2023, 11:48 PM)
2pcs is fine. front or back depend ur familiarity with car
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actually any difference if put behind rather then front ?


QUOTE(amscouzach57 @ Jan 10 2023, 07:59 AM)
If your wheel setup is not staggered, put the 2 new tyres at the rear, & bring the old rear tyres to the front.
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may i know why you recommend doing so ?
DSV4600
post Jan 12 2023, 12:07 AM

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Two questions:
1) What's the minimal acceptable thread depth for any tire, especially when it comes to wet weather?
2) If my tire is 5+ years old, but less than 10% used, can I still drive with it?
HalseyFrangipane
post Jan 12 2023, 12:08 AM

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QUOTE(White2000 @ Jan 11 2023, 10:38 AM)
user posted image

Anyone knows what this means? NG condition? RR 1mm means no longer enough?
*
Replace your rear tyres immediately. Minimum legal tread depth is 1.6 mm.
ktek
post Jan 12 2023, 12:54 AM

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NG is no gooding. hehe
ktek
post Jan 12 2023, 01:01 AM

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QUOTE(zoixc @ Jan 11 2023, 11:59 PM)
actually any difference if put behind rather then front ?
may i know why you recommend doing so ?
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asking = dunno? just follow majority say behind lol.
i put front becos i tried both liao. maybe u should try both side as well
zoixc
post Jan 12 2023, 01:33 AM

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QUOTE(ktek @ Jan 12 2023, 01:01 AM)
asking = dunno? just follow majority say behind lol.
i put front becos i tried both liao. maybe u should try both side as well
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kalau tau wont be asking liao lol
last time family car always is change front and take the better one put behind
amscouzach57
post Jan 12 2023, 06:21 AM

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QUOTE(zoixc @ Jan 11 2023, 11:59 PM)
actually any difference if put behind rather then front ?
may i know why you recommend doing so ?
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This is so that your rear tires to have more grip than the front.

This is to provide vehicle stability & prevent oversteer or tailspin in case your car loses traction when driven a bit hard.

If new tires/grippier tires are placed on the front, there will be a risk of oversteer.

If new tires/grippier tires are placed on the rear, there will be a risk of understeer instead.

For a typical driver, it is easier to recover from an understeer than an oversteer situation during driving.
White2000
post Jan 12 2023, 10:26 AM

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QUOTE(kennykck @ Jan 11 2023, 12:17 PM)
Minimum is 1.6mm then need to change. Yours is asking to go heaven earlier. Somemore is 6 years old, rubber maybe harden and crack easily
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QUOTE(HalseyFrangipane @ Jan 12 2023, 12:08 AM)
Replace your rear tyres immediately. Minimum legal tread depth is 1.6 mm.
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QUOTE(ktek @ Jan 12 2023, 12:54 AM)
NG is no gooding. hehe
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Thanks for the advice. Just went and checked again, all four tyre thread is still comfortably above the TWI thread wear indicator, even without TWI its very obvious tyre tread still way above 1.6mm and rubber still in good condition.

Which is why I asked here, idk how workshop got the 1 mm and NG thing. That said already planning on my next tyre, michellin XM2+ or continential CC6.

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