@ascentale @SRLevine @bikenite A4: interesting answers here! I don't have any 'rule' and of course if I am in an accident or hit my head/helmet hard then I will probably replace it right away. I often drop it when I am unlocking my bike which I am sure isn't great for it but hopefully that's not too bad. I think my current one is like 4-5 years old? #BikeNite