This SWORKz factory replacement idler gear is machined from aluminum and features a 20-tooth count for use in the S12-2 and S12-3 drivetrain. The integrated shaft design positions the gear precisely within the gearbox, maintaining proper mesh and power transfer to the drivetrain. A direct swap for the original part, it is suited for hobbyists rebuilding or upgrading the transmission on their 1:10 2WD buggy. Features: 20-tooth idler gear Machined aluminum construction Integrated shaft for precise gearbox placement Compatible with S12-2 and S12-3 platforms 7/7/26 cs