05-09-2016, 12:58 PM
It's the process of adjusting the various parts of the bike (seat height, seat position, handlebar height, etc) to your particular needs. Depending on where you buy it, they may do a very basic fit as part of a purchase, and that may be all you need. Other places might not even bother, or will charge a nominal fee for it, especially if you don't ask about it. There are normally a number of options available roughly along the lines of: more time - more precise fit - more money.