The GPM 40Cr Steel Motor Gear 25T is engineered for reliable torque transfer on Traxxas XRT 8S platforms. Machined profile features include a D-shaped motor gear bore, a 25-tooth count and a tooth face width of 9mm to maintain consistent contact pattern under load. Material selection is 40Cr carbon steel with a black hardening treatment to increase surface hardness and wear resistance while preserving core toughness. The outer diameter measures 40mm, making the component suitable for motors matching those dimensions when installed with correct alignment and backlash settings.