The GPM 40CR Steel Motor Gear 30T is made from high-strength 40Cr carbon steel to give improved wear resistance over stock gears. A hardening black treatment boosts surface durability and helps the gear run cleaner for longer. The design uses a double kimi screw fixation to hold the gear securely under load, making it a solid upgrade choice for hobbyists focused on drivetrain longevity and consistent power transfer.
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