Yeah Racing Hardened Steel Mod 1 Pinion Gear (5mm Bore) (25T)Yeah Racing Hardened Steel Mod 1 Pinion Gear. Made from HD steel for extreme durability and strength. These pinions use a 5mm bore and are laser etched with pitch and teeth count for easy identification. These pinions are available in multiple sizes. Please select the size you need from the list above.

Features:

• Made from hardened steel
• Uses a 5mm bore
• Laser etched with pitch and teeth count