Holmes Hobbies TrailMaster Sport 550 Brushed Motor (21T)

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The Holmes Hobbies TrailMaster Sport 550 Brushed Motor is a budget motor built for messy, dirty, off road action. Whether on the rocks or in the dirt, the TrailMaster Sport is perfectly at home. Great choice for young drivers or running in the muck without ruining an expensive motor.


  • Zero timing, universal installation and rotation direction
  • 1/8th inch shaft diameter
  • 36mm OD x 57mm length (not including shaft)
  • m3 mount holes, 25mm spacing, "540" standard
  • ball bearing on output side
  • bronze bushing on end bell side
  • High strength Y45 Ferrite magnets

This product was added to our catalog on November 17, 2017

Verified Owner
Tuesday, Oct 15 2019 (5 months ago)
Holmes Hobbies TrailMaster Sport 550 Brushed Motor (21T)
I'm quite surprised nobody has yet made a review of this motor in this site. Well, for starters it's the best bang for the buck motor for budget-conscious hobbyists/and or beginners like me who wants to upgrade their stock motor. I have read and watched a lot of reviews praising this $20 motor, and so i put it in my Redcat Gen8 and TRX-4 rigs. Paired with the HobbyWing Quicrun 1080 ESC, that combo is unbeatable in cost-performance ratio in my opinion. Holmes Hobbies really did a great job, this motor runs smoothly and has a lot of torque,runs cool even on 3S, quiet, and durable.
Verified Owner
Friday, Mar 6 2020 (3 weeks ago)
Holmes Hobbies TrailMaster Sport 550 Brushed Motor (21T)
This is my third Holmes Hobbies motor and as always it is just outstanding. Best brushed motors I know of.