This aftermarket spur gear set is an RC-scale replacement intended for ARRMA Kraton 8S platforms, supplied by GPM under model MAKX029TS. The pair includes a 29-tooth and a 30-tooth spur gear manufactured from 20CrMnTi steel and cut to 1.5Mod pitch, offering a direct replacement path for the listed factory part numbers ARA310920 and ARA311051.
Use case and role: these gears are suited for high-power 8S brushless Kraton variants where users require a hardened steel spur to resist wear under heavy load and aggressive driving. They function as the primary large gear in the drivetrain and are intended for RC applications only.
Installation notes: confirm the 1.5Mod pitch matches your pinion gear, check axial alignment and backlash before operation, and re-tighten the mounting hardware after the first run. These steps help maintain proper gear mesh and extend service life without modifying gearbox components.
As an aftermarket steel option, this 29T/30T set provides a hardened alternative for Kraton 8S drivetrains where stronger gear material and correct 1.5Mod sizing are required for durable, consistent performance.
Copyright © 2008-2026 rcjaz.com All rights reserved