The GPM SMTG19T is a precision engineered motor gear produced in hardened steel #45 to enhance service life in demanding RC use. It maintains a 0.6MM tooth distance and a 3.175MM central bore, and it is suitable for pinion sizes from 14T to 20T commonly used on Tamiya brushless motors. This part is intended as a durable upgrade for hobbyists seeking consistent gear engagement and reduced wear.