The GPM SBJ017T pinion is a precision steel 17-tooth component developed for Baja 5b, 5b Ss and 5T platforms. Manufactured to deliver consistent tooth profile and tight running tolerances, this pinion is intended to improve drivetrain reliability when paired with the GPM Sbj057T spur gear. Its hardened steel construction is selected to resist wear and provide repeatable engagement under load, making it suitable for demanding use and targeted upgrades.