Four Tire Information Misinterpret

  

1. The hair strand on the tire indicates tire wear off

I didn't actually find out about it at first as I know that it is not going to affect driving experience. Until when a customer told me that a technician told her about this hair strand tells you when to change your tyre.

Talks about experience, I may not have as much as those who have worked in this industry for even more than 20 years, but I know this is certainly wrong.

Why tire manufacturer create this "extra" features when all brands manufacturer have an international standard to tell users in the tread area and sidewall that the depth of the tread has reached 1.6mm.

But I fail to answer the purpose of this hair strand. So I check it out.

**According to the Hong Kong Traffic Ordinance, the legal requirement for the tire depth is 1mm. That implies, even if your tire reach this 1.6mm level, you can still use it (legally).... but do you really think you can even reach this 1.6mm tread depth?

Check out this post to find out how to use a coin to measure 1mm depth if you really manage to reach this 1.6mm

https://tyrehood.blogspot.com/2016/10/check.html

This hair strand is called "vent spews". In the process of manufacturing tires, pressure is added (same as the process of retreading tyre), but too much pressure will cause air mixing in the rubber. Hence, extra air pressure is released through this "vent spews"

2. Why new tires are not packaged

Packaging happened more than a decade ago. But most brands (or rather sole agent of the brands) do not require packaging due to the land pollution. Imagine how much trash is produced when more than 100 thousands tires packaging are thrown.

Afterall, packaging is not vacuum tight. It will not delay tire age. Just not easily dirty.

In addition, it is not easy to check if a tire is really a brand new tire (A brand new tire definition: The tire has not mounted into the vehicle. Even if it is mounted on the vehicle, a traveling of 1cm will lose the "brand new" identity). When a brand new tire is mounted onto the car, some of the coloring (like those yellow and red dot) do not come off right away.

3. Why there is not EU labeling for this tire? What is the value of the EU label for this tire?

EU label for the tire consists of sound, petrol efficiency, and wet performance of the tire. The EU label is meant for EU. That is understatement. It's not for Hong Kong, therefore not all tyres have such EU label with them. You can use the label as a reference, but this reference is not accurate to apply in Hong Kong because of weather, road conditions etc. (even both places are using asphalt as a material, the mixture, layer and mirco of the materials might differ)

Additionally, there is no standard in Hong Kong to use a reference for tire, it is not compulsory to have a EU label on the tire. When the tire is not export to EU, it does not have that EU label as well. Even if it does, not all tyres will have it stick on them.

So, it is not possible to answer the EU label value for each of the tire.

(A customer does not seem to believe this when he asked why, the Firestone tire that I sold to him, does not have the EU label)

btw, the EU label will change its regulation on 1 May 2021 onwards. The label design may change the next time when you purchase them.

4. UTQG (Uniform Tire Quality Grading)

UTQG is the U.S standard of the tire testing. It looks at Wear, traction, and Temperature. 

e.g. 

Sailun Elite Wear ->360, Traction -> A, Temperature -> A

Goodyear F1A5 Wear->300, Traction -> AA, Temperature -> A

Just like EU label, UTQG is for reference. And if you rely on UTQG and EU label testing reference, wouldn't Sailun is more a suitable brand for you to choose? (Since quite a number of ppl asking for recommendation, these data shows)

All tires export to U.S and EU require the manufacturer to print these data on the tyre, and they have the result on their database, it will not be possible to fake these data.

(It explains why Yokohama do not have UTQG for those made in Japan as they have factories located in Europe)

The myth of manufacture date

It is undoubted that every customers want the latest manufacturing date of the tyre. Who doesn't? Even if you purchase food in the supermarket, you probably choose the one with longer expiry date. 

Some may have heard "The tire has [expired], look at the manufacturing date. It's time to change"

If you saw the previous post, Michelin, Dunlop, Pirelli (and more) manufacturer mentioned that it is difficult to estimate if the tire has expired.

Afterall, the supplier inventory have "shelter" for the tires to keep them from exposing to rain.

A) The UK government decided to ban 10 year-old tire

Some other opinions mentioned about keeping it 3 years, 6 years. Some HK retailers also mentioned about 3 years.

So, do we really need the latest manufacturing date?

Followor Like Tyrehood facebook page to let me know that you are interested in tire issues. Then I will tell more about it in the next post.

四個輪胎資訊被誤解 Four Tire Information Misinterpret

 (English version below)

1. 呔上既"毛"係可以用黎判斷車呔仲用唔用到

其實呢樣野當初我冇研究. 因為我知呢樣野唔影響實際行車情況. 但最近有個客同我講話有位technician 話佢知呢啲"毛" (或者係咪叫頭髮) 係可以判斷條呔係咪仲行到. 如果啲"毛"甩左就係講緊條呔差唔多要換啦.

(我唔知中文叫咩... 呔毛? 呔髮? )

但係呢... 製造商唔唔會冇啦啦整到成條呔都係毛黎為左話俾人知個啲係用黎判斷輪胎仲用唔用得(真係整條毛). 特別係本身輪胎上面已經有指標話俾人知呔紋用到邊個位就差唔多換. 但我當時又解釋唔到呢啲係咩黎.... 

所有輪胎製造商造出黎既呔都會有呢個指標. 呢個指標代表現時輪胎深度係1.6mm (通常都好準)

香港既交通法例, 輪胎深度需要為 1mm. 即係您行到呢個位都仲可以繼續行.... 但係您估您真係可以行到呢個1.6mm位咩?

如果您咁好彩真係行到呢個位, 您都可以參考番之前出既 post, 點睇呔紋已經到 1mm.

https://tyrehood.blogspot.com/2016/10/check.html

直到之後... 知道係咩黎啦.

呢啲"毛"既有個名叫 "vent spews". 係製造輪胎過程中會輸入氣壓(番新呔其實都同一做法), 但過多既氣壓會令到有空氣夾住左係膠入面. 所以需要排出多餘的空氣時就產生左 "vent spews".

2. 點解新呔冇包裝 (好似買新電話咁)

十幾二十年前都仲會. 但而家好多牌子都可免則免. 因為包住咁多條呔另外拆晒出黎後都會製造大量垃圾. 仲要幾十萬條呔都咁拆.

由於唔係真空包裝, 唔會因為包住就令到條呔壽命加長. 最多只係冇咁易污穢.

至於點樣睇全新呔... 其實真係好難. (全新呔定義係, 未有裝過係車上行駛. 就算該輪胎裝左落車後行左1cm 既距離都係叫舊呔) 因為當新呔裝左上去部車, 有部分呔既呔肚位會有黃點紅點, 都冇咁快甩. 

3. 點解冇歐盟標籤EU label? 個款呔既EU label 個數值係幾多?

歐盟標籤, 睇個名就知係歐洲國家既標準去睇條呔既性能. 主要係聲音, 耗油, 同埋濕地性能. 歐盟標籤係俾歐洲國家用, 唔係俾香港用. 當然唔係條條呔都會有歐盟標籤. 您可以用黎做一個參考, 但係呢一個參考並不會準確. 因為天氣, 地面等情況同香港唔同. (雖然地面大家都用緊 asphalt 但都有分唔同既mixture, layer, micro etc)

另外, 由於香港係冇標準去睇, 當然唔需要有歐盟標籤, 就唔會款款呔都會有. 加上, 唔係款款呔都會出國去歐洲, 就算有, 間廠都唔會每一批生產既呔都貼上歐盟標籤. 更加答唔到您到底個數值係幾多.

(因為有個客好唔相信我, 問我點解Firestone 個條呔係冇歐盟標籤, 係咁既咩?)

btw, 歐盟標籤將會於2021年5月1號開始改變有關要求. 到時又會有唔同既標籤.

4. UTQG (Uniform Tire Quality Grading)

UTQG 係美國既輪胎測試標準. 有別於 EU 既係佢睇 損耗(Wear), 咬地力(traction), 溫度(Temperature). 

e.g. 

Sailun Elite Wear ->360, Traction -> A, Temperature -> A

Goodyear F1A5 Wear->300, Traction -> AA, Temperature -> A

UTQG 同EU label 一樣都只能做參考. 原來同頭先講既一樣. 但如果您相信UTQG 同 EU label, 咁仲唔係賽輪最底玩? (因為唔少人都會問有咩介紹, 咩底玩既呔, 而家有晒証明, 個數值差唔多, 唔係唔揀實輪掛?)

之後您又會再問一樣野, 會唔會做假.

所有輪胎出口到歐盟銷售必須要有 EU label, 美國銷售就必須要有 UTQG, 似照番佢地既標準去測試. 測試後數值係會保留係佢地既運輸處既 database, 仲可以做到假咩? 

(所以您都係唔會見到 Yokohama 係有UTQG, 因為日本製既呔唔出口到美國, 另一邊有歐洲製既Yokohama)

如果只係睇呢兩個標準, 事情就簡單. 不過Engineer 既野又點會咁簡單. 

一定要用最新既製造年份?

每一個消費者都想要新年份既呔. 有邊個唔想. 就算去超市都會揀番個冇咁快過期既食物. 更何況係用係部車到既呔.

由於唔少都有聽聞過, "由製造年份計起, 去到某幾年就要換嫁啦, 條呔老化嫁啦"

如果有睇到上一個post, Michelin, Dunlop, Pirelli 等輪胎製造商既網站都有提及到, 根本係好難去作出預算去計幾時真係老化 (Oxidation). 

再加上香港既輪胎供應商都有個 "有蓋既倉" 擋風擋雨擋太陽. Keep 好存貨.

由於輪胎冇 "幾時過期" 呢樣野, 一於睇睇唔同既參考睇睇.

A) 英國政府係2020年7月決定唔俾大型車輛, 包括小巴, 使用已經超過10年既輪胎

英國其中都參考左Michelin 所提及到既, (tyres should be replaced after 10 years)

其他好多唔同意見, 都圍住 3年, 6年. 香港都有其他鋪頭講3年. 

咁到底係咪一定要最新? 一定要當年既製造年份先最好? 

-----------------------------------------

  

1. The hair strand on the tire indicates tire wear off

I didn't actually find out about it at first as I know that it is not going to affect driving experience. Until when a customer told me that a technician told her about this hair strand tells you when to change your tyre.

Talks about experience, I may not have as much as those who have worked in this industry for even more than 20 years, but I know this is certainly wrong.

Why tire manufacturer create this "extra" features when all brands manufacturer have an international standard to tell users in the tread area and sidewall that the depth of the tread has reached 1.6mm.

But I fail to answer the purpose of this hair strand. So I check it out.

**According to the Hong Kong Traffic Ordinance, the legal requirement for the tire depth is 1mm. That implies, even if your tire reach this 1.6mm level, you can still use it (legally).... but do you really think you can even reach this 1.6mm tread depth?

Check out this post to find out how to use a coin to measure 1mm depth if you really manage to reach this 1.6mm

https://tyrehood.blogspot.com/2016/10/check.html

This hair strand is called "vent spews". In the process of manufacturing tires, pressure is added (same as the process of retreading tyre), but too much pressure will cause air mixing in the rubber. Hence, extra air pressure is released through this "vent spews"

2. Why new tires are not packaged

Packaging happened more than a decade ago. But most brands (or rather sole agent of the brands) do not require packaging due to the land pollution. Imagine how much trash is produced when more than 100 thousands tires packaging are thrown.

Afterall, packaging is not vacuum tight. It will not delay tire age. Just not easily dirty.

In addition, it is not easy to check if a tire is really a brand new tire (A brand new tire definition: The tire has not mounted into the vehicle. Even if it is mounted on the vehicle, a traveling of 1cm will lose the "brand new" identity). When a brand new tire is mounted onto the car, some of the coloring (like those yellow and red dot) do not come off right away.

3. Why there is not EU labeling for this tire? What is the value of the EU label for this tire?

EU label for the tire consists of sound, petrol efficiency, and wet performance of the tire. The EU label is meant for EU. That is understatement. It's not for Hong Kong, therefore not all tyres have such EU label with them. You can use the label as a reference, but this reference is not accurate to apply in Hong Kong because of weather, road conditions etc. (even both places are using asphalt as a material, the mixture, layer and mirco of the materials might differ)

Additionally, there is no standard in Hong Kong to use a reference for tire, it is not compulsory to have a EU label on the tire. When the tire is not export to EU, it does not have that EU label as well. Even if it does, not all tyres will have it stick on them.

So, it is not possible to answer the EU label value for each of the tire.

(A customer does not seem to believe this when he asked why, the Firestone tire that I sold to him, does not have the EU label)

btw, the EU label will change its regulation on 1 May 2021 onwards. The label design may change the next time when you purchase them.

4. UTQG (Uniform Tire Quality Grading)

UTQG is the U.S standard of the tire testing. It looks at Wear, traction, and Temperature. 

e.g. 

Sailun Elite Wear ->360, Traction -> A, Temperature -> A

Goodyear F1A5 Wear->300, Traction -> AA, Temperature -> A

Just like EU label, UTQG is for reference. And if you rely on UTQG and EU label testing reference, wouldn't Sailun is more a suitable brand for you to choose? (Since quite a number of ppl asking for recommendation, these data shows)

All tires export to U.S and EU require the manufacturer to print these data on the tyre, and they have the result on their database, it will not be possible to fake these data.

(It explains why Yokohama do not have UTQG for those made in Japan as they have factories located in Europe)

The myth of manufacture date

It is undoubted that every customers want the latest manufacturing date of the tyre. Who doesn't? Even if you purchase food in the supermarket, you probably choose the one with longer expiry date. 

Some may have heard "The tire has [expired], look at the manufacturing date. It's time to change"

If you saw the previous post, Michelin, Dunlop, Pirelli (and more) manufacturer mentioned that it is difficult to estimate if the tire has expired.

Afterall, the supplier inventory have "shelter" for the tires to keep them from exposing to rain.

A) The UK government decided to ban 10 year-old tire

Some other opinions mentioned about keeping it 3 years, 6 years. Some HK retailers also mentioned about 3 years.

So, do we really need the latest manufacturing date?

Tyrehood 聖誕節禮物 Christmas Present

(English version at the bottom) 

為感謝Tyrehood 客戶一直的支持, Tyrehood 想送番份聖誕節禮物俾大家. 

客戶需於2018年開始直到2020年12月26日, 已經購買4條輪胎或以上, 經網上訂購(包括經whatsapp 51130668 Jimmy 訂購). 

詳細有關禮物資料請禁入去 Tyrehood Zone 手機apps 入面既 資訊(Info Center) , 再禁入去 Tyrehood 消息及文章 (Tyrehood News and Articles) 有關詳細.

未下載apps 既Tyrehood 客戶記得下載番, 開番個account 再whatsapp 俾 51130668 Jimmy 啦.

祝大家聖誕節快樂.

-----------------

To thank Tyrehood customers support since the opening of the store, Tyrehood want to give you a christmas present this year.

This present is for customers who purchase at least 4 tyres or above since 2018 until 26th Dec 2020, via Tyrehood website or from Jimmy

For detail, please click into Tyrehood Zone app , Info Center -> Tyrehood News and Articles for more details.

If you have not installed the app, remember to install it and create an account.

Merry Christmas and Happy New Year

Five Questions Related to Tyre Issues

Most of the questions are related to the following, it will be good to know more about it.

1. Tyre depth looks like it is still usable

Some may still talk about it. The depth of the tyre that looks still usable does not mean it really keeps your car running as the rubber will age, thus causing a drop in traction performance, especially during wet condition.

2. How long will the tyre age? 

Two years? Three years? Five years?

[Source: Michelin website]

But most of the manufacturers will say, "It varies"

 [Source: Dunlop website]

[Source: Michelin website]

"Estimating the duration of a set of tyres is a much more complex affair" [Source: Pirelli website]

"No idea" is actually a correct answer

3. Tyre Warranty

Authorized Official Tyre has warranty, for the following brands:

Kenda - 12 months warranty

Tyre sidewall or other areas has a bulb or ball shape due to tyre quality issue. (require further checking if it is because of quality issue). Sole agent will deliver a new one for you. (Tyre puncture is not included in this warranty)

Dunlop - 12 months warranty

I did not check in detail. You got to ask them.

Continental - 180 days warranty

Within 180 days or a certain mileage, if the tire has a bulb due to quality issue, sole agent will deliver a  new one for you. 

"tire puncture is also included in the warranty" -> I am unsure if this term is still valid. You got to ask them.

Goodyear - 180 days warranty

Within 180 days or a certain mileage, if the tire has a bulb due to quality issue, sole agent will deliver a  new one for you.

For other brands, there is no specific warranty being mentioned. However, you could request for checking the quality issue, especially if the tire has a bulb after you just installed. The cumbersome point is the tire is needed to deliver to their office for checking. If quality issue is found, they will deliver a new one for you.

Anyway, the sole agents will not pay for the "labor fee". You need to ask the retail store if there is any "labor fee" incurred for replacing and/or deliver to the sole agent for checking

4. Can it be fixed if the tire has a bulb

It is unable to fix the bulb as it is caused by broken lining in the inner tyre. 

Anyway, could you avoid kicking the bulb?

At least, not in front of me. I do not want to witness the bulb suddenly burst and injure yourself.

If you have not seen how the bulb will burst, I can share some photos and videos.

5a. Tyre sidewall damaged (no air leaks), can it be fixed?

Most has raised up this question if this part can be fixed. But before that, something needs to be taken note that, 

According to the Hong Kong Road Traffic Regulation, tire that has a cut exceed at least 25mm should not be mounted on any vehicle. (subject to changes if the ordinance is amended)

But it does not mention whether it is still consider legal if the cut is "repaired". The same rule applies to vehicle inspection.

If you can fork out money, it can be "repaired". But the tire needs to be dismounted, and it may take longer than a day to "repair". The cost may even be higher than purchasing a new tyre.

Either you ignore it, or you purchase a new tyre. Do not ask me the cost of patching it up as I do not have such service.

5b. Sidewall has a puncture

I mentioned about internal patch previously. After experimenting, I decide to delete that post and write a new one about this.

Internal patch is not a sure-fix way to patch the sidewall puncture. If it stops leaking, you could still use it but purchase a new one should be the only option that you have in mind.

[Source: Michelin website]

Basically all the tire manufacturer will tell you to purchase a new one if the sidewall is damaged.

If you have purchased at Tyrehood online, remember to install the latest Tyrehood Zone app and create a account, and let me (Jimmy) know about it. I will update your account such that you can access Tyrehood customer only functions.

五個常被問有關呔既問題 Five Questions Related to Tyre Issues

(English version below)

通常一問到呔, 好多時都會圍住個幾個問題, 了解多啲

1. 啲紋仲好深, 仲用到.

深紋都唔代表住仲可以用. 因為膠會老化, 咬地力大減, 特別係濕地上. 不能只睇紋去判斷是否仲可以用.

2. 幾時會老化? 可以頂到幾耐?

2年? 3年? 5年?

以5年時間為指標 [Source: Michelin website]

但差不多所有輪胎製造商都會講. "It varies" (視情況而定)

不能準確得知輪胎壽命 [Source: Dunlop website]

無法得知一條呔可以實際用到幾耐 [Source: Michelin website]

計算出輪胎可以用幾耐係更加複雜 [Source: Pirelli website]

"唔知" 其實真係一個答案黎的.


3. 輪胎有冇保養

現時行貨保養有

Kenda (建大) - 12個月保養.

輪胎呔壁等位置(因質量問題)凸起 ("即生仔"), 可以更換全新輪胎. (需要檢察是否因質量問題). 中釘漏氣等問題不受呢個保養入面.

Dunlop - 12個月保養

冇詳細了解, 車主需要另外問問佢地.

Continental (馬牌) - 180日保養.

180日內 或 (唔記得左幾多里) 內, 若出現 "生仔"等質量問題, 可以更換全新輪胎.

"另外若中釘都可以受保" <- 呢個唔知仲有冇, 車主要自己另外再問.

Goodyear - 90日保養

90日內 或 (唔記得左幾多里) 內, 若出現 "生仔"等質量問題, 可以更換全新輪胎.

其他牌子就冇特別提及到有關保養問題, 但其實您裝左冇幾耐就 "生仔" 既話, 就需要拆條呔出黎俾佢地檢查, 發現係質量問題就會賠番條呔俾您. 

不過以上所有保養既共同點係... 裝拆費用係另計的. 費用就要車主自己問番賣俾您既輪胎店.

4. 呔生仔補唔補到

因為係輪胎入面既鋼線斷裂, 特別係打氣個陣先會見到出現"生仔", 特別係呔肚位. 所以係補唔到.

但車主可唔可以, 唔好見到 "生仔" 個位就用腳踩落去睇下有冇問題呢? 

至少都唔好係我面前踩. 我唔想睇住個位突然俾您整爆, 整傷您隻腳. 

您未見過佢點爆, 睇左相, 仲有video 您就知點解我唔想您地咁做.

5a. 呔肚位有破損或受損(冇漏氣), 補唔補到

呢個應該係最多人問既問題. 未答補唔補到之前, 先講講一樣野.

依照交通條例說明 (暫時係我寫呢個post 都仲係, 之後仲係唔係都可以睇番運輸署), 任何車輛的輪胎都不能有切割口超過25毫米的長度. 

但冇提及如果"補" 個個位, 仲算唔算係都仲係叫"切割口". 驗車都係. 因為驗車都係跟番交通條例. 

咁至於呢個位係咪可以 "補".... 您俾得起錢, 係真係得既. 但大前提係要拆條呔出黎. 仲可能要超過一日既時間. 搞搞埋埋, 個費用仲可能貴過您買一條新呔.

如果您出現呢個情況, 不如唔好理佢吧. 睇完呢個post都唔好問我真係補要幾錢, 因為我唔補呢啲.

5b. 呔肚位爆呔漏氣

之前有提及到補呔唔係間間都補到, 並提及到內補既問題. 

經過多次實驗後, 決定delete 左之前個post 係呢個從新寫過.

內補並不是萬能. 特別係呔肚位. 補到咪繼續玩多陣, 但基本上您都要預左買番條新呔.

[Source: Michelin website]

基本上所有 輪胎製造商都會講, 如果您條呔係呔肚位中釘漏氣, 都不能修補並需要更換.

如果您經Tyrehood online 方式購買, 記得下載番 Tyrehood Zone 手機apps, 再whatsapp 番俾Jimmy 知, 我會update 番您個account, 先可以用到apps 入面既所有功能.

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Most of the questions are related to the following, it will be good to know more about it.

1. Tyre depth looks like it is still usable

Some may still talk about it. The depth of the tyre that looks still usable does not mean it really keeps your car running as the rubber will age, thus causing a drop in traction performance, especially during wet condition.

2. How long will the tyre age? 

Two years? Three years? Five years?

[Source: Michelin website]

But most of the manufacturers will say, "It varies"

 [Source: Dunlop website]

[Source: Michelin website]

"Estimating the duration of a set of tyres is a much more complex affair" [Source: Pirelli website]

"No idea" is actually a correct answer

3. Tyre Warranty

Authorized Official Tyre has warranty, for the following brands:

Kenda - 12 months warranty

Tyre sidewall or other areas has a bulb or ball shape due to tyre quality issue. (require further checking if it is because of quality issue). Sole agent will deliver a new one for you. (Tyre puncture is not included in this warranty)

Dunlop - 12 months warranty

I did not check in detail. You got to ask them.

Continental - 180 days warranty

Within 180 days or a certain mileage, if the tire has a bulb due to quality issue, sole agent will deliver a  new one for you. 

"tire puncture is also included in the warranty" -> I am unsure if this term is still valid. You got to ask them.

Goodyear - 180 days warranty

Within 180 days or a certain mileage, if the tire has a bulb due to quality issue, sole agent will deliver a  new one for you.

For other brands, there is no specific warranty being mentioned. However, you could request for checking the quality issue, especially if the tire has a bulb after you just installed. The cumbersome point is the tire is needed to deliver to their office for checking. If quality issue is found, they will deliver a new one for you.

Anyway, the sole agents will not pay for the "labor fee". You need to ask the retail store if there is any "labor fee" incurred for replacing and/or deliver to the sole agent for checking

4. Can it be fixed if the tire has a bulb

It is unable to fix the bulb as it is caused by broken lining in the inner tyre. 

Anyway, could you avoid kicking the bulb?

At least, not in front of me. I do not want to witness the bulb suddenly burst and injure yourself.

If you have not seen how the bulb will burst, I can share some photos and videos.

5a. Tyre sidewall damaged (no air leaks), can it be fixed?

Most has raised up this question if this part can be fixed. But before that, something needs to be taken note that, 

According to the Hong Kong Road Traffic Regulation, tire that has a cut exceed at least 25mm should not be mounted on any vehicle. (subject to changes if the ordinance is amended)

But it does not mention whether it is still consider legal if the cut is "repaired". The same rule applies to vehicle inspection.

If you can fork out money, it can be "repaired". But the tire needs to be dismounted, and it may take longer than a day to "repair". The cost may even be higher than purchasing a new tyre.

Either you ignore it, or you purchase a new tyre. Do not ask me the cost of patching it up as I do not have such service.

5b. Sidewall has a puncture

I mentioned about internal patch previously. After experimenting, I decide to delete that post and write a new one about this.

Internal patch is not a sure-fix way to patch the sidewall puncture. If it stops leaking, you could still use it but purchase a new one should be the only option that you have in mind.

[Source: Michelin website]

Basically all the tire manufacturer will tell you to purchase a new one if the sidewall is damaged.

If you have purchased at Tyrehood online, remember to install the latest Tyrehood Zone app and create a account, and let me (Jimmy) know about it. I will update your account such that you can access Tyrehood customer only functions.

Tyrehood Zone 2.0

 隔左過大半年, 終於推出Tyrehood Zone 2.0

今次更新, 

1. 新功能俾車主睇錶版燈, 就算出左盞燈都唔駛左搵右搵, 直接禁番手機apps 就搞點.

2. 另外新功能都包括電池同汽車配件(配件暫時只有俾日本車). 部分汽車配件都只有Tyrehood客戶先可以見到更多.

DIY 由 Tyrehood (其實係我自己整) 既product 只限於已經係Tyrehood (以網購等方式購買) 既客戶先會整.

另外個人資料入面, 另設有4個功能都只限於Tyrehood 客戶先可以用到. Tyrehood 既客戶記得裝番 Tyrehood Zone 2.0, 開番個account 我先可以幫大家update 番. 記得善用 Tyrehood Zone 2.0

下一個更新, 將會有更多有用既功能, 到時會再考慮是否會對所有車主開放.

Asymmetric tire installation on the left and on the right 不對稱輪胎的安裝位置

The last post talked about three different tire patterns, and asymmetric tire pattern obtained are most often manufactured.

Asymmetric tire has an indicator "OUTSIDE" on the sidewall to tell people that it is mounted with the side facing outwards of the vehicle, and it can be installed on any side of the vehicle...... until a customer asked me regarding the installation of this asymmetric tyre on the left and right, I found out that I still need to learn more...

When this type of tyre is installed on the left and right, the patterns become different. This time, I use Kenda KR400 asymmetric tire to have a look of it.

The left side of the tire, the pattern (looking from outside to inside) goes from left top to the right bottom, and the right side of tire, the pattern (looking from outside to inside) goes from right bottom to the left top. 

Under normal circumstances, the pattern mounting on the left should be the same as on the right or vice versa (as depicted on the picture below, using red line)

The final production of such tire pattern is (probably or looks like) because of the manufacturing cost is lower, and according to the testing result which shows there is no issue with the performance.

In foreign country(ies), there are models with asymmetric tyre pattern indicated to mount on the left and right. 

Anyway, we do not need to care much about the pattern as there is only such asymmetric tire available in Hong Kong market, and as long as we are following the OUTSIDE and INSIDE mounting instruction

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 係上一次就講到分別有三款呔紋, 而不對稱呔紋又係市場上佔左一定既地位.

不對稱呔紋輪胎有既標示, OUTSIDE, 都好明顯話俾人知個位係對出, 就應該可以裝係部車任何前後左右既位置...... 直到我俾人問左一個問題, 我發現我自己真係唔夠細心. 

當呢種呔裝係左面, 同埋右面既, 就會發現呔紋其實係唔同左方向. 今次就拎左Kenda KR400 既不對稱輪胎睇睇. 細心觀察下, 裝係左邊既呔紋(由出面去入面睇) 係由左上角去右下角. 而裝係右邊既呔紋係(由出面去入面睇)由右下角去左上角

正常黎講, 裝係左邊既呔紋應該同裝係右邊既呔紋成為倒影 (如下圖, 用紅色線示).  

係最後決定生產出黎最後都係得一款, inside outside 呔紋而不分安裝於左或右, 好似係因為製造成本費會較平, 同埋根據測試後發現就算似照第一張圖既情況下安裝, 性能都冇問題. 

不過咁樣睇第一圖既裝法, 總係覺得好似.. 怪怪的?

外國市場都好似有不對稱既呔係有分安裝於左及右. 不過係呢到香港, 都係唔好諗咁多啦, 跟番佢話係OUTSIDE 就向番出咁裝. 因為我地都冇得揀. 只係得呢啲OUTSIDE 同 INSIDE 既呔.