Head speed is calculated by multiplying the KV rating of the motor by the nominal battery pack voltage, then dividing this product by the gear ratio to determine RPM. The stock Blade 230 uses a 3900KV Motor, an 11.1V battery pack, and uses a gear ratio of 11.66 (140/12). Using these figures we can determine that the head-speed of a stock Blade 230S is ~3,713 RPM. The 134 tooth variant in this package will increase head-speed to 3,879 RPM, a total increase of 166 RPM.
The grips have been modified to accept a shortened ball stud compared to the original grip. These ball studs decrease the total length from grip base to ball end by ~2.25mm which results in a significant increase in negative collective pitch and a modest increase in positive collective pitch. This results in much more aggressive maneuverability during flight and improved inverted flight acceleration and control.