The rotor spacer kit comes with the long pinion side spacer and 4 thin shims for spacing the rotor in the motor setup. It is important to space the rotor as close to the sensor board as possible without it hitting the sensor board.
Fits all 540 sized brushless motors with a 1/8” shaft.
Name: Rotor Spacer Kit
Part#: TEP1157
MSRP: $1.99
[source: www.teamtrinity.com]