This bare steel base plate is helpful when building your own custom, frisco-mount motorcycle gas tank. Frisco mount means that the gas tank tunnel is shallow, so the gas tank sits up high on the frame's backbone. This base palte is 17-3/4" long, 11-3/8" wide, and has a 2" wide tunnel intended for a 1-3/4" diameter backbone (which is a common size), and is approximately 16ga thickness. . Pair with one of our DIY Gas Tank Shells or make one of your own! Check out the category for useful fab items for your project. Have fun!