The throttle tube is metal

41mm Fork Tube Diameter

Replaces OEM# 16814-77

NOTE: Struts and rubber-mounted motorcycles do not mix

Includes Progressive Suspension rate springs combined with preload spacers

Grooved Stainless Steel Hidden/Internal Stop Fork Neck Cup Kit 1949-1987 Harley-Davidson Big Twins Subcategory_Fender Hardware The throttle tube is metalPremium Stainless Steel Steel Neck Cups & Fork Stop Plate Fits all Big Twin frames with loose type bearing cups, and most aftermarket style frames that accept press in neck cups Features a built in, hidden fork stop Allows a turning radius choice of 35 or 45 Bearings & Races Not Included (See NOTE Below) This Premium Hidden Internal Fork Stop Kit is made from Stainless Steel and keeps the forks from banging the gas tank with no tabs or brackets