These custom chrome and black Harley spike gas caps are made from billet aluminum and match our other spike products. The diameter is 2.9 inches (same as Harley OEM cap), and they are .750 high.
These gas caps come in right handed vented, and left hand non-vented and have the same nylon thread and correct pressure relief as the original Harley gas caps.
Fits all Harley Davidson fat bob tanks 1982/later. (includes Sportsters)