我的T3也騎了1300+公里了 本來就是光頭胎
現在後輪更是光滑了 (還注意到有一小割痕)
前輪外胎還有細纹路
我就在想 那要不要交換外胎?


我想 網路上應該有討論過吧
Google 了"tire rotation bike" 第一個看到的就是Sheldon Brown's 的文章(這位老兄經驗十足 網站有好多有用的資訊)
在此也跟大家分享
簡答: 交換前後外胎是很嚴重的錯誤 不要做
詳答: 唯一可以交換前後外胎的時機是當你想要換後輪外胎的時候
如果你真想省錢(但有點麻煩) 可以將新的外胎裝在前輪 將前輪舊的外胎裝在後輪
理由是前輪外胎在安全上比後輪更是關鍵 你應該要有個可靠的前輪胎
前輪在行車安全上比較重要
因為前輪一旦爆了 會失去方向的控制 很容易就摔車
後輪爆了還比較不會摔
It is common for a front tire to outlast a rear tire by as much as three to one. Rear tires have more weight on them, and also have to deal with drive forces.
....
Well-meaning cyclists, even some mechanics who don't know any better, sometimes try to deal with this by swapping tires, putting the less worn front tire on the back wheel, and moving the worn-but-usable rear tire to the front. The idea is to equalize the wear on the two tires, but this is a serious mistake, don't do it!
The only time tire rotation is appropriate on a bicycle is when you are replacing the rear tire. If you feel like taking the trouble, and use the same type of tire front and rear, you should move the front tire to the rear wheel, and install the new tire in front.
The reason for this is that the front tire is much more critical for safety than the rear, so you should have the more reliable tire on the front.
If you have a blowout, if it is on the rear tire, you have a very good chance of bringing the bike to a controlled stop. If your front tire blows, you can lose steering control, and a crash is a real possibility.