How many times to change a bicycle helmet?

I have been had bicycle accident with helmet. My first was 3 years. I knocked into car door and helmet crack into itself. This taped up OK, so keeped using this. I figure lucky helmet as had I think 4 more accidents each time hit head in helmet, yet no harm. Helmet is looks bad with tape. I s this too much time for... show more I have been had bicycle accident with helmet. My first was 3 years. I knocked into car door and helmet crack into itself. This taped up OK, so keeped using this. I figure lucky helmet as had I think 4 more accidents each time hit head in helmet, yet no harm. Helmet is looks bad with tape. I s this too much time for helmet or keep going as it save me many injunies. I never had to go to hospital, so is lucky helmet. Is this best??
7 answers 7