Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)

Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
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The Hobbywing XERUN XR10 Justock 1/10 Sensored Brushless ESC was developed for Zero-timing racing. The timing has been permanently set to 0°, to ensure 100% fair and competitive racing when racing in spec motor classes.

The SD G2.1 motor is perfectly matched with the XR10-Justock ESC for all zero timing spec racing. The motor is compatible with other Hobbywing Electronic Speed Controllers, as well as other brands and is used in various 1/10th, 1/12th scale on-road & off-road vehicles. It is an ideal choice for Stock or Sport class racing but can also be a great choice for beginners or for the racers looking for a practice motor.


  • ESC
    • High Reliability & Durability: Reliable hardware with advanced software allows the XR10 Justock to provide high power output and overload protection.
    • Efficient Heat Dissipation: The modified heat sink provides increased surface area. This, combined with Hobbywing's patented copper heat conductive plates, allows heat to be quickly transferred to the heatsink for dissipation. The added high performance fan creates a reliable heat management system for maximum cooling.
    • Small Footprint: The small, compact size allows the XR10 Justock to fit most 1/10 touring car, 1/12 pan and F1 applications.
    • Many Applications: The ESC was designed for 1/10 touring car, 1/12 pan and F1 applications, but is an excellent choice for any spec racing class. Plus, when paired with a 32T or similar motor, it is an ideal low cost choice for rock crawler applications.
    • Single Button Programming & Factory Reset: The Set button on the ESC allows the user to easily program or reset the ESC to default mode.
    • Regular Firmware Updates: Upgrade the XR10 Justock with the Hobbywing USB Link software, multifunction LCD program box and a PC. Hobbywing updates the ESC firmware regularly, giving you access to upgraded features on a consistent basis.
  • Motor
    • Great Construction: The use of a heat-resistant magnet attached aluminum case and double insulated windings, high precision & strength bearings, and rotor with a strong structure guarantees outstanding performance and super durability.
    • Cool Look & Good Heat-dissipation: The aluminum case (different from the Justock3650 G1’s iron case) with a unique design not only creates a cool look but helps to dissipate heat.
    • Linear & Smooth Control: The built-in Hall sensor non-adjustable end bell combined with a high precision and balanced rotor guarantees the user a smooth and linear power on demand.
    • Re-buildable Design: The end bell is easy to be removed for maintenance purposes and for the replacement of common wearing parts such as rotor and sensor module (Ex bearings).
    • Copper Solder Tabs: Copper solder tabs with super low impedance at the load end of the motor allows users to directly solder the ESC wires onto the tabs for solid connection and simple wiring.
  • ESC
    • Model: XERUN XR10 Justock
    • Cont./Peak Current: 60A/380A
    • Motor Limit: Sensored / Sensorless Brushless Motor
    • Applications: 1/10, 1/12 on-road & off-road CLUB competition and normal training
    • Motor Limit:
    • 2S LiPo/4-6S NiMH: ≥8.5T (1/10 on-road), ≥11.5T (1/10 off-road)
    • 3S LiPo/8-9S NiMH:≥13.5T (1/10 on-road), ≥17.5T (1/10 off-road)
    • LiPo/NiMH Cells: 2-3S LiPo/4-9S NiMH
    • BEC Output: 6V, 2A (Line-mode BEC)
    • Fan (Included): Powered by the stable BEC output voltage of 6V
    • Connectors: Input End: No, Output End: No
    • Size: 33.5x28.5x30.5mm
    • Weight: 59.8g
    • ESC Programming: Via the Rx Cable (or Throttle Control Cable)
  • 17.5T Motor
    • Pole Count: 2
    • KV Rating: 2450
    • LiPo Cells: 2-3S
    • No Load Current: 3.5A
    • Can Diameter: 35.9m
    • Can Length: 52.5mm
    • Shaft Diameter: 3.17mm
    • Weight: 175g
    • Timing: Fixed
    • Applications: Spec/Stock class racing
Verified Owner
Friday, Feb 1 2019 (about a year ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
I bought this combo to replace the Reedy brushless non sensored ESC and 3300kv motor that came in my SC10RS RTR. I just got into racing in a stock SCT class at my local track and 17.5 is the requirement. They allowed the Reedy 3300kv motor even though its out of class because it came stock in my truck. I knew that I would be losing some power with the change over but I wanted the predictability that a sensored motor has. Our winter season indoor off road track is carpet and not very big, meaning I could never get up to full speed and I already had the truck geared fairly low (18/87).

When switching from the Reedy to this the lost of power was noticeable, I can't find any info from Reedy directly, but from what I've gathered the 3300kv motor I had was equivalent to somewhere between a 13.5 to a 15 turn motor. For my particular track I found a 20/84 gearing with this motor gave me decent punch with more top end than I could get on the ground. I would like a little more punch though, so I may be gearing it lower.

The motor did give me what I hoped for in the predictability department, wayyyy smoother off the line and when getting on the power at slow speeds.

What I don't like is when I enabled reverse on the ESC for practice the motor behaved as if it wasn't sensored. It would sometimes be jittery and delayed from a stop. I reset the ESC to factory defaults and the problem went away, but so did my reverse. IDK if this is common with sensored motors or not. I asked a few guys at the track, but none of them had ever enable reverse on their trucks so they weren't sure.

Overall I'm happy with it, the build quality seems very good, and though I haven't gotten direct temperature reading from it, doing the finger test, I can say it is running cooler than my old motor did. Their is so many variables when looking at the performance of my car and other drivers I can't really give a one to one comparison, and I don't have another 17.5 motor to compare it too. I would say though the performance is at least as good as what the vast majority of other drivers in my class are running. The one guy that sticks out as faster is running timing on the can of his motor and (I was told) just his motor not including his ESC was 200$. So not really a fair comparison. As for dependability, I've only put about two hours of run time on it so far, but if it gives me trouble down the road I will be back to update my review.

This system is not water proof what so ever. Idk why, I just assumed they all were, so a friendly reminder for other noobs out there.
Also after I bought this setup, I found out that even though my class is a "stock" class, we're allowed to run timing on our motors, just not the ESC. Seems kind of dumb to me that they would allow any kind of timing in a stock class, but if I had known that, I may have spend more $$ and bought a motor with timing.
Verified Owner
Monday, Dec 21 2020 (4 weeks ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
Best combo in the world!
I love HOBBY WING. Because high end models are great, lower price models are also work well.
I will continue taking hobby wing motors and ESC combo forever.
Verified Owner
Tuesday, May 19 2020 (8 months ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
Just got back into the hobby and this was a great combo addition to my B6.2 kit. Great buy!
Verified Owner
Friday, Apr 24 2020 (9 months ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
Works great. what more could you ask for? I like the heat sink on the newer juststock esc.
Verified Owner
Thursday, Mar 26 2020 (10 months ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
Been working good in a B6.1 buggy on dirt oval still have not tried clay offroad to see if it has the power for the jumps but it's a spec class.
Verified Owner
Friday, Feb 14 2020 (11 months ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
This is a fantastic entry level competition esc/motor combo. The power is great for somebody trying to get a feel for their car, yet not overbearing. Top speed is mediocre but great bottom end. You can be competitive and have fun with this. Remember, driving skills are most important.
Verified Owner
Thursday, Feb 6 2020 (11 months ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)
Perfect combo, easy and high performance. Amain always perfect
Wednesday, Dec 30 2020 (3 weeks ago)
Hobbywing XR10 Justock Sensored Brushless ESC/SD G2.1 Motor Combo (17.5T)