I dunno, but until January '16, I had 4; my daughter 2, and my son 2. Serious cyclists have [almost] as many bikes as that guy has ammo, assuming those cans are filled. Take a look at this, for ex.: http://www.velominati.com/the-rules/ Btw, their book, "The Rules" is an interesting look into cycling and at times, laugh out loud funny.