2025年7月3日星期四

正規補呔方法其實係內補? 內補係萬能? The appropriate way of tyre patch is internal patch? Internal patch can resolve everything?

 (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, 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

(氣泡出現位置, 影片係下面)

(無晒氣都仲係到出緊泡)
曾經見過私家車呔都有同樣情況

(已經內補完後, 入面無氣, 都仲有泡)
        
補完都仲漏, 好多人見到都一定話補唔到. 但會唔會其實只係呔紋與呔之間仲繼續存在空氣? 



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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.

Afterall, a plug may last 2 to 3 years (depending on situation). Most drivers may have their tire tread worn over these years.

2. Tire repair guideline states a size and sidewall cannot be repaired

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.

(Air leaking area, video below)

(Bubble still coming out without air pressure inside)
The same thing has happened to a private vehicle tyre

(Bubble still popping after patch, and tyre without air)
        

In this situation, I believe all ppl will consider it as fail to patch. But, could it be just the air trapped inside at the hole area?