There are many reasons why Harley-Davidson bikes often go for aftermarket foot pegs. One of the main reasons for that is increased grip. Stock foot pegs are good enough for most riders out there, but there are some who prefer a more planted feel and opt for an aftermarket foot peg. Aftermarket foot pegs are lighter yet stronger than stock foot legs. Moreover, they come in a number of variations in terms of size and shape. They also provide a better grip on the sole of the boot.