[問題] 請高手幫忙看一下輪胎是否該換
如圖
http://ppt.cc/t6N2
http://ppt.cc/3oNT 中間凹槽裡一條一條是硬化嗎？？
請問這樣輪胎是否該換了呢？
媽媽買菜車平時都龜速最外車道（很少看到騎比我慢的...）
但最近騎起來有點重托的感覺
打飽了氣似乎也沒差很多
而且最近幾天在倒退嚕時輪胎那邊會吱吱吱的
想說是不是該換了呢？
爬文看了一些板友的教學（看三角形，但我沒找到三角形指示＠＠）
感恩
新春愉快
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