New product line from Yeah Racing, a whole series of Aluminum Motor Gear will be soon released @ yeahracing.com. The motor gear series including 2 major types of Pitch Pinion – the 48 Pitch Pinion and the 64 Pitch Pinion. The 48 Pitch Pinion available from 15 teeth to 38 teeth. The 64 Pitch Pinion available from 17 teeth to 52 teeth. The Yeah Racing Aluminum Motor Gear are made by 7075 high quality aluminum with gold coated surface.