[問題]安全帽年限?
各位版友大家好
目前本人的安全帽M2R-J2 已經戴了四年了
不知道他會不會因時間氧化而使得他的耐撞性降低?
另外由於本人大多都是在板橋一帶活動(通常吃個飯,買東西...),駕駛不超過四十分
不知有沒有買全罩式安全帽的必要?
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