Parts/Electric power/Brushless motors/Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)
Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)
Tekin

Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)

Part # TEKTT25184.4(18)
Where to buy
$159.99
AMain Hobbies
Seen Oct 12, 2026
$159.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

This is the Tekin Pro4 HD 4300kV 4-Pole Brushless Motor. Tekin's Pro4 HD Motor raises the bar in 4wd short course, with the torque and power needed to level the competition. With kV ranges to accommodate 2S, 3S and 4S applications, 1/10 4WD Short Course has never been exposed to this much power! The Pro4 HD's longer 550 can and 4 pole design delivers the off the charts performance gains you need to move your truck to the front of the pack.

Features:
  • Designed to be paired with the RX8 Electronic Speed Control
  • 4 Pole 12 Slot Hi-torque 550 Motor Design
  • CNC Machined 6061 T6 Billet Aluminum Heatsink Can
  • Neodymium Sintered Magnets
  • Rebuildable Design
  • High Purity Copper Windings Maximizes Efficiency
  • Precision Engineered for Maximum Energy Conversion
  • Dual-Plug Sensor Wire Harness for use with all sensored systems
  • High RPM ABEC5 Oversized Bearings
Specifications:
Turns: 1.5D
Voltage: 2S - 7.4V
kV: 4300
Rotor: 18.5mm
Weight: 7.8oz / 221g
Shaft Dimensions: .60x.196" / 15.3x5mm
Motor Diameter:
1.4" / 35.8mm
Motor Length: 2.5" / 62.5mm
Bearing Dimensions: Front: 5x14x5mm / Rear: 5x11x5
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews4.4 · 18 reviews

AnonymousVerified owneron Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)

This motor has loads of power...so much power on reserve its stupid. I had ran the pro4 540 in some of my pals trucks and felt it lacked overall power compared to my ballistic 550. I was unable to find comparisons of ppl running the Ballistic 550 compared to the pro4hd, hence why im making the review. I loved the Ballistic 550 and is what i held as the mark for my 1/10 4x4sc. had loads of power and was very efficient running very cool at 120-130 with 30* of timing. Granted i know it was only a 2 pole but it would pull away from pro4 540s with ease. after installing and running the pro4hd i am VERY VERY SATISFIED. i was able to make jumps and clear sections with ease that i other wise had issues with when running the ballistic 550 ( these same sections the pro4 540 had no chance at clearing or doubling in) but now with the hd i am actually running less throttle and no timing and im able to sail over the jumps and such. so much power on board its sick. i did notice that my ESC ran nearly 15-20* hotter with the pro4 hd. this alone tells me its drawing more power. once i had it geared correctly all bets are off. i feel comfortable racing any car on the track now. TEKIN YOU DID IT RIGHT...GREAT MOTOR....LOADS OF POWER/TORQUE.

15 found this helpful
AnonymousVerified owneron Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)

This thing is awesome and has tons of power. This is my first Pro 4 motor to own so I cannot compare it to the other motors (540s) but one of my buddies that has used one says the new 550s are leaps and bounds ahead of the 540 motors. He was having temp issues in his TLR 2.0. I am using this thing in my Tekno SCT410 coming in around 6.5 lbs and I am running around 155F on the motor and 110F on the RX8 Gen 2. This combo is super smooth and I have plenty in reserve on the straight aways. I am using one of the new Pro Tek 5600mAh 100C batteries with it and this thing is a rocket on the track. We normally run 6 min races but looking my batteries after the races I will be able to run 10 min races with ease. I definitely would recommend the RX8 Gen 2 and Pro 4HD 4300 for someone getting the Tekno SCT410. You will not be disappointed.

10 found this helpful
Matt Murrayon Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)

This motor is about as good as the pro4 540. Didn't notice any more torque or top end compared to the other. But this motor will run cooler with very close to the same performance. If you have the 540 just stick with it. But if your in the market for a new 4x4 motor this is what I would buy due to cooler temps

7 found this helpful
AnonymousVerified owneron Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)

I've switched from a Viper VTX8 to a Tekin RX8 Gen 2 and all I can say is 'WOW'. What a difference--I won and TQ'd the first time out with this set-up. So, don't try and pair this motor with anything other than the RX8 Gen2--nothing else can handle the amp draw. I was negative at first, but now, I've got to gear it way down to keep my SCT410 under control.

4 found this helpful
Alfonso QuarantaVerified owneron Tekin Pro4 HD 4-Pole Brushless 550 Motor w/5mm Shaft (4,300kV)

This motor is a must buy! All the torque and speed I would desire! I run it on my TLR Scte 2.0 with RX8 GenII esc and it's the fastest combo out there, even with 80% of current limiter. Temperature after 12 minutes never goes over 70°C for the motor and 40°C for the esc. I'd buy it again hands down!

1 found this helpful
What reviewers say

Reviewers largely praise the Pro4 HD 550 (4,300kV) for strong torque and top-end speed, particularly in 4x4 and SC trucks, with several reporting it runs cooler than the 540 and that it outperformed earlier motors. Some note it is only marginally different from the 540 in one comparison, and a few say performance varied between units of the same model. Pairing with the RX8 Gen 2 ESC is commonly recommended, and timing above about 30 degrees can raise motor temperature. Recurring complaints involve customer support responsiveness, a sensor board failure within the warranty period, and loose or stripped motor plate bolts on arrival. Overall, most reviews are very positive, though the sample includes several support-related complaints and a few mixed performance comparisons.

  • + Strong torque and top-end speed
  • + Runs cooler than the 540 motor
  • + Performs well with RX8 Gen 2 ESC
  • + Competitive in racing results
  • − Poor customer support responsiveness
  • − Sensor board failure within warranty
  • − Loose or stripped motor plate bolts
  • − Performance varies between units
Summary generated from the reviews above.

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