Dunlop Geomax MX53 Hard Intermediate Rear Tyre 80 100 12 Tube Type greenworks australia The FJ Dynamics RM21 Robotic The FJ Dynamics RM21 Robotic Mower for sports fields together with the LM01 Robotic Line Marker comes standard with a top class navigation system that gives precise lines marked in minutes 800 rpm Motor type BLDC (brushless) Equipment Gear ratio 1 Drive gear angle 30 ° Trimmer head T35 M10 Battery Not included Number of batteries included 0 Battery charger Not included Sound and noise Sound power level • MX53 front tire blocks are 1mm higher and have been redistributed to give riders better steering feel and more biting edges • Front and rear tires include tie bars between select knobs to reduce flex at the base of the knobs