Attitude Inc Fuel Tank, Steel Raw , 2.5 Gallons , Cole Foster Bobber Style, for Harley Custom, EachAttitute Inc's bobber style fuel tank has a capacity of 2. 5 Gallons and comes complete with a Pop Up Cap. This absolutely righteous tank designed by Cole Foster of Salinas Boyz. The tank incorporates a flush mounted mini pop up gas cap and a retro styled raised rib running down the center of the tank. Each tank has been developed to fit stock frames, but can be adapted for custom applications. Existing stock rubber mounts can be used.