Swing arm bags (also known as solo bags or chopper bags) are motorcycle bags designed specifically for the side of the motorcycle. With options for swing arm bags for the right or left side of the bike, Jafrum has all your motorcycle luggage needs covered at deep discount pricing. The SA2011 and SA2012 bags are designed for use on rigid customs and monoshock swing arm designs like those found on Harley Soft tails and Yamaha V-stars. The right side setup of the 2011 will only work on a small amount of custom motorcycles, or motorcycles with street sweeper exhausts that leave the right side of the swingarm exposed. For the rest of you, with exhaust on the right side of the bike, covering the right side of the swingarm, the 2012 bag is the right choice.