High Power, High Torque, High Performance, Smooth Startup! When you need the smoothest brushless motor on the rocks, the Puller Pro Stubby v2 delivers! Perfectly suited as a drop in motor for any rock crawler that uses 540 size motors, yet the Puller Pro Stubby v2 is shorter and lighter than other brands without sacrificing power or torque! It is designed for scale builds, trail riding, and competitive crawling. Improvements from v1 include better drag brake, adjustable and more accurate sensors, better performance in reverse rotation rigs, beefier solder tabs for lower resistance, and a sideways oriented sensor port for tight installs. Features: Four pole 18mm diameter x 16mm length rotor Twelve slot stator 13g phase wires with 4mm bullets installed Oversized bearings Sensored with adjustable timing Waterproof sensor board Includes sensor wire Specs: Shorter than a 540 motor 25mm mounting pattern M3 mounting screws 3.175mm shaft 36mm diameter 45mm length 164g (5.8oz) with wires 50,000 rpm max 1 year warranty from date of purchase. Does not include damage from overheating, rusting, or improper installation.