Why do bikers wear the number 13?

Related questions

1. Does OTP mean?
2. What does FLW mean in Portuguese?
3. What does opt mean in cars?
4. What's the difference between an MC and an MCC?
5. What does ot7 mean?
6. What does Favorite OTP mean?
7. What does FLW stand for?
8. What does WFY mean?
9. What means WTH?
10. What does the number 13 symbolize?

Tags

1. #other
2. #wearing
3. #often
4. #either
5. #biker
6. #meanings
7. #stand
8. #letter
9. #assumed
10. #marijuana
11. #alphabet
12. #drugs
13. #patch
14. #generally
15. #world
16. #motorcycle
17. #number
18. #being
19. #someone
20. #involved