MRR Short Stack Competition Sensored Brushless Motor (21.5T) by Maclan

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The Maclan Racing MRR Short Stack Competition Sensored Brushless Motors are well suited for any stock spec class in RC car racing. Featuring the latest hall sensor technology and highest grade copper wires, the MRR Short Stacks are a no compromise stock racing motor option.


  • The latest hall sensor technology that precisely deliver all the RPM and torque to you.
  • Short stator design for the lowest internal resistance and maximum performance (13.5/17.5/21.5)
  • Highest grade copper wires provide maximum conductivity with no compromise.
  • Heavy duty concave shape soldering tabs minimize the resistance and easy soldering work.
  • CNC 6061 T6 full aluminum case with maximum venting design for optimized durability and airflow cooling
  • Rebuild-able structure allows easy maintenance.
  • ROAR Approved
  • Includes 200mm Sensor Wire

Turn: 21.5
Case Length:
Case Diameter: 1.42in/36mm
Shaft Extension: 0.552in/14mm
Shaft Size: 3.17mm
Weight: 6oz/170g ±2g
Poles: 2 Poles
Max Voltage: 3S Li-Po (10.5T ~25.5T)
Short Stack Design: Yes
Stock Class Default Rotors: 10.5T~21.5T MCL4076 12.5mm Torque Spec Rotor

This product was added to our catalog on March 4, 2016.

Heather Pepe
Thursday, Sep 29 2016 (3 weeks ago)
Maclan MRR Short Stack Competition Sensored Brushless Motor (21.5T)
Awesome power and a quality motor was super happy with performance of the 21.5 on the new crc black carpet it had plenty of punch and never ran hot will be trying this motor in the 17.5 as well cant wait Thanks Maclan