*English version below*
曾經有兩個電話 (懷疑係同一人) 打黎,
第一人
👀: "平時裝開貨van呔夠磅就驗到車喎?"
👨: "係夠磅呀, 不過要8浸"
上面全部都唔係 8"浸" 呔, 唔通可以批到有問題既全新車入黎香港銷售?
First peson
呔. 電池. 配件既價錢, 請到 https://www.tyrehood.com 汽車保險, 勞保, MPF, 及其他個人保險如自願醫保等可另外查詢 5113 0668 個人保險牌照 JH7091, MPF牌照 156845 To find out more about tyre, car battery price https://www.tyrehood.com/en/index.php Vehicle Insurance, Employee Compensation Insurance, MPF, and other personal e.g. medical can be enquired: 5113 0668 Individual Insurance Agent License: JH7091, MPF Registration License: 156845 Tyrehood Zone mobile application (Android or iOS) is also available
*English version below*
曾經有兩個電話 (懷疑係同一人) 打黎,
第一人
First peson
*English version below*
有部分人曾經都提過有關輪胎寬度問題. 新購買同一尺寸的輪胎對比下, 看似比較寬身/窄身.
❓係肉眼上既錯覺 , 定 實際尺寸真係有唔同?
今次我會幫大家搜羅, 盡量每一個尺寸, 每一款 (就算係同牌子), 唔同製造地點都度下到底條條呔既寬度係咪真係有分別.
🚙係呢樣之前, 要先幫大家重新了解一下, 輪胎既寬度
**注: 由於係用人手, 用拉尺去度, 一定會有誤差. 另外, 輪胎寬度應該係以裝左上呔鈴, 有足夠輪胎氣壓, 未有裝上汽車前測量. 只可用作為參考之用. 今次只係想睇下, 咁多款呔下其實只係我地肉眼上既錯覺, 覺得一啲呔好似比另一款呔較大/較細.
**特別注意既係, 一款同一尺寸, 同一製造地點, 但唔同製造日期, 係會有機會有輕微誤差. 過去係某啲輪胎廠係根據製造日期批次去回收有問題既輪胎.
肉眼上既錯覺 (optical illusion), 其中必定會了解到 "Müller-Lyer illusion" 及 "Ponzo illusion" - 兩條相同既橫線但看起來好似一長一短, 及兩條相同既直線看起來一高一底.
普通既直線都會令到視覺上產生錯覺. (大部分) 輪胎 (我個人認為) 都係一樣. 胎紋上既設計, 包括主要排水紋及其他周邊細少既槽會影響視覺上睇出黎既寬度.呔肚位所示既寬度有國際認可要求. (下文叫佢做"總寬度"), 但呔紋的寬度並沒有特別固定要求. 但暫時我所量度既呔款當中, 大家呔紋的寬度其實都係差不多相同.
問題黎啦 ❓❓❓❓❓❓❓❓❓
👀
Q2: 每個尺寸既總寬度都有10mm 之差, 會唔會有部分輪胎尺寸總寬度寫 (e.g. 255), 但實際可能係 250mm? 更有可能係246mm ? 大於"可接受範圍"?
👀
Q3: 有冇可能兩個不同尺寸 e.g. 205/55 R16 vs 215/55 R16, 總寬度相差 10mm, 但呔紋寬度係一樣長?
👀
Ans: 呢個就係我今次會幫大家收集既數據. 下回分解.
1) Bridgestone 石橋 Potenza Sport, 235/35 R19, 歐洲製
2) Pirelli 派拉利 255/45 R19 Pzero4, 歐洲製
更多有關輪胎標記可以係網站了解更多.
https://www.tyrehood.com/tyremarking.php
------------------------------------------------------------------------------------------------------
Some have enquired about the physical width of a tyre. Purchasing the same size, why different models look wider or narrower than the other?
❓ Is it an optical illusion, or the size physically really different?
This time I will try to gather as much data as possible, with different sizes, different model and different manufacturing place to ascertain if the width of each tyre (even of the same brand) really has a difference.
🚙But before that, let's understand more about TIRE WIDTH
**Note: There will be a human error in measuring the width of the tire (using measuring tape). The standard of measuring tire width is supposed under the following conditions:
Hence, this experiment is just for reference with no accurate data. It is supposed to find out if the look of a tire that looks narrower or wider is simply due to optical illusion.
**Another Note: A batch of same size, same model, same manufacturing place but different manufacturing date could have a slight variation on the measurement. After all, tire manufacturer recall tires based on manufacturing date.
In this way, I believe that (most) tires that look wider or narrower due to tread design with different styles of rib, block, sipe.
❓❓❓❓❓❓❓❓❓
👀
Q2: With an 10mm difference in width, will there be tires with size overall width (e.g. 255), but actual physical width is 250mm, or even narrower, 246mm in which greater than the international tolerance?
👀
Q3: For two different size e.g. 205/55 R16 vs 215/55 R16, overall width is 10mm but tire tread width is the same?
👀
Ans: The answer is going to reveal next time after data gathering.
1) Bridgestone Potenza Sport, 235/35 R19, Made in Europe
2) Pirelli 255/45 R19 Pzero4, Made in Europe
Both sizes having (should be) the same measurement with different tire labelling, tire design will be slightly different. T0 (design for Tesla), its sidewall near the rim is more extruded, covering up Tesla original rim. On the other hand, MO (design for Benz) the design of the sidewall is slightly different. Hence, it appears to be more inward.
For more details about tire marking, you can access to the below webpage for detail:
https://www.tyrehood.com/en/tyremarking.php
(English version below)
補呔, 每個駕駛車渣幾年車都一定會試過一次. 您未試過唔代表永遠都唔會. 係香港, 私家車普通中左釘後, 會吉支俗稱"牛筋" 填補個位後, 又續行駛.
但其實, 根據(所有國家)輪胎廠商既維修輪胎指引
1. 正常補呔方法係內補
英國, 美國輪胎製造商協會表明, 內補, 先係叫修補輪胎. 係呔出面吉支針落去唔係叫修補.
係香港, 吉"牛筋" 已經係好多年既習慣. 就連您拖車番原廠都係吉"牛筋", 盛惠 $100. 係香港既習慣係要 快 & 平. 拆出黎內補再裝番成個程序需時可能要最快15分鐘. 平均可能30分鐘. 至於內補分為冷補, 熱補個啲我就唔多講.
但呢到既香港, 中釘次數係多過世界各地. 若一條 15" 中國牌子既呔係 $500/條. 車主中左3次釘, 內補既價錢足夠佢買過一條全新既呔.
而家普通吉支針, 都仲可能玩到兩三年(視情況而定). 兩三年有好多平日渣車既車主都已經玩完一條呔. 仲會想內補?2. 修補輪胎指引列明太大及呔邊位不能修補
美國輪胎製造商協會列明, 不修補中釘位超過6mm直徑 的位置. 不修補呔肚位/呔邊位(sidewall)及類近呔肚位的位置(下圖紅色圈住).
英國輪胎製造商協會列明, 若修補呔邊位, 需要被真-專業公司去修補. 仲可能需要重新翻新 (可能係加料補番個位)
您又會唔會想跟足? 別人都在吉針就算. 補呔吉針吉得多, 自然所有人都慣左補呔先吉針.
A. 內補係萬能
過去有兩個人打黎問我內補. 話內補唔係萬能既咩.
如果我答係, 我一定收好貴.
通常做得內補, 有9成都係我自己同車主提議俾我試, 個啲位通常都近呔肚位. 曾經幾次試過用左一個幾小時內補最後又成功左. 仲有個特登渣過黎話俾晒4條呔我試內補呔肚位(就算唔成功都照付內補價錢), 我補左3條, 係最後整左啲野又成功無漏氣.
B. 未補都仲漏氣, 補完都仲漏氣
不過唔係次次中釘都一定補得到. 仲要唔知點解, 氣呔已經明明無晒氣, 都仲會有氣泡*出現 (睇下圖及影片)
*氣泡既出現係因為入面既空氣向出時遇上出面流入黎既水而做成. 最簡單既理解方法可以睇成魚缸入面既打氣泵, 空氣由氣泵入面出黎, 型成泡再浮向水面
Tire patch, every driver will surely experience at least once after driving for a few years. In Hong Kong, a simple plug from the external tire is a common patch in the private vehicle industry.
Yet, according to tire manufacturer association (from different countries) guideline,
1. The correct way of tire patch is internal patch
According to British, U.S. tire manufacturer association, internal patch is the right way of repair. A plug is not considered a path.
However, a plug as a patch has become a habit in H.K. Even if you get a tow service to the agent repair center, they will still use a plug that cost you $100. An internal patch may take 15 minutes, or average 30 minutes, which may consider a long time for some HK drivers.
In addition, tire leak due to nails and screw happened more frequently than any other parts of the world. If an 15" China brand tyre only cost $500/tyre and a vehicle owner got a internal patch 3 times, the price for the patch can get him a new tyre.
According to U.S. tire manufacturer association, puncture injury cannot be over 6mm diameter. Repair areas limited to tread area only (picture below circle area is not considered puncture repair area).
British Tyre Manufacturer Association states that those area above considered major repair, and is required to be repaired by professional or remolded.
A. Internal patch can resolve everything
Two separate people enquired about internal patch, saying that isn't internal patch can patch any area?
If I say yes, you will expect a really high price for this internal patch.
90% of the time, I normally ask vehicle owners to let me try for internal patch, normally at those near the sidewall. A person even asked me to try patching the sidewall and willing to pay even if I may fail to repair it. I patched 3 of them and succeeded.
B. Still leaking even without air, and after patch
Not all areas can be patched even at the tread area. Especially air is still leaking out even the tyre is without air inside.