Thunder Power Z3R-S Stock Spec 540 Sensored Brushless Motor (17.5T)

Thunder Power
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
Low Price: $94.99
Discontinued Online
This is the Thunder Power 17.5 Turn Z3R-S Stock Spec 540 Sensored Brushless Motor. Designed and developed from the ground-up, tested rigorously and race-proven in the hands of many of the worlds top racers including Paul Lemieux, Z3R 540 brushless motors are built to deliver maximum performance and reliability. From oval to touring, stadium to short course and everything in between, Thunder Power offers a Z3R 540 brushless motor that is perfect for any application. Z3R-S Stock Spec motors are available in 10.5T, 13.5T, 17.5T and 21.5T winds, all ROAR approved and ready to race at sanctioned events and beyond.

Z3R motors are easy to maintain and tune with a fully re-buildable design and are supported by a full line of replacement and option parts, including ROAR approved tuning rotors. Each motor is constructed from high-quality materials including a balanced, high-strength neodymium rotor, high-temperature coated copper wire and plated copper solder tabs for long life. While easy-to-set adjustable timing from 050 degrees and fast-switching, high-temp sensors make it easy to maximize performance. Plus Z3R brushless motors are backed by Thunder Power RCs industry-leading 2-year warranty and 2-years of 50% off damage replacement program coverage!


  • Re-buildable design for easy maintenance
  • Balanced, high-strength neodymium rotor
  • High-temp coated pure copper wire
  • Plated copper solder tabs
  • Fast-switching, high-temp sensors
Type: Brushless
Size: 540
# of Turns/Windings: 17.5
Timing: Adjustable (0-50 degrees)
Weight: 6.2 oz (176g)
Overall Diameter: 1.41 in (35.7mm)
Shaft Diameter: 0.125 in (3.18mm)
Overall Length: 2.07 in (52.5mm)

This product was added to our catalog on February 17, 2011.

jim allmon
Tuesday, Mar 20 2012 (about 6 years ago)
Thunder Power Z3R-S Stock Spec 540 Sensored Brushless Motor (17.5T)
ive had this motor for awhile now and i am very impressed runs cool and i could push it harder than any other 17.5 i have. i used a high torque which makes this motor even better. you can stop reading this now because you should just buy it, you will NOT regret it)
Ryan Minar
Thursday, Jan 19 2012 (about 6 years ago)
Thunder Power Z3R-S Stock Spec 540 Sensored Brushless Motor (17.5T)
Holy Crap! This is my new favorite 17.5. It's faster and smoother than my Epic Revtech 13.5. I'm running it in my B4.1 FT with an LRP SXX V.2 pushing the Power. This is gonna be the new motor to run, you'll see.)
Joe VanDalsem
Verified Owner
Sunday, Aug 18 2013 (about 4 years ago)
Thunder Power Z3R-S Stock Spec 540 Sensored Brushless Motor (17.5T)
Motor Burned up on me on its first pack.

Gearing wasn't anything crazy. 70spur, 26 pinion. 25 Timing. Same gearing and timing I'd been running the Tekin Gen2 17.5(rpm) on for months with no heat issues.

Too bad, I'd heard good things, maybe I just got a bad one.

During the 5 or so laps I did get in before it burned up on me, it seemed to move the car pretty well, but didn't blow my tekin out of the water like I was expecting it to. :(

The other issue I have is why PHILLIPS head hard ware for the timing adjustment? Actually, to adjust timing, you have to loosen 3 hex screws, AND 3 phillips head screws.... That's just.. cheap/weird/stupid. Why not make them all hex?

Overall, not impressed. At all.)
Mike Bethe
Verified Owner
Wednesday, Feb 20 2013 (about 5 years ago)
Thunder Power Z3R-S Stock Spec 540 Sensored Brushless Motor (17.5T)
Very nice power plant. I own 2 of these cool/smooth/fast running motors in my B4'1 and T4.1. with a Tekin RS temps in the mid 120's on the infrared. Suprising ammount of torque much better then my redline can't wait to drop one of the torque rotors in and see what the limits are. I'd venture to say it will be just as good as good if not better then d3.5's out now. Lead the pack-don't follow it!!!)