XRAY 365721 21T Hard-Coated Aluminum Pinion Gear  [XR-365721]

Overview of the XRAY 365721 Pinion

For builders and racers aiming for consistent driveline response, the XRAY 365721 Aluminum Pinion Gear is a reliable upgrade. Made from 7075 T6 aluminum, this 21T pinion is light yet tough, and its hard-coated surface improves wear resistance. It is engineered to run smoothly with minimal vibration, making it a good choice when dialing in gear ratios on a variety of race surfaces.

Durability and Gear Accuracy

The XRAY 365721 benefits from precision gear machining that produces accurate tooth profiles for true running. This accuracy reduces vibration and helps transfer power efficiently. The internal threading design simplifies fitting and removal during setup changes.

Marking and Fitment Details

Each pinion is laser etched with its tooth count for quick identification during pit work. Offered in common tooth counts, these gears let you tailor final drive ratios to match track demands, improving both acceleration and top speed balance.