They are preload adjustable to tune them in to your weight for the best handling

seems a bit strange but that is how it was done

and these tanks are road-tested and ready for anything you can throw at them

working great with upswept pipes or running low and parallel to the ground on drag pipes

Nuts and locks are exact duplicates of original used on Big Twins 1930-57

#2076-10 Gas Tank Mounting Acorn Kit 1991-Up Harley-Davidson Dyna - Chrome Plated Subcategory_Gas Tank Mounts & Hardware They are preload adjustable toChrome plated custom mill hex acorn nuts, washers and studs to mount gas tank on 1991 up Dyna. Made in Ohio, USA.