SKU: 89776078521

JR PROPO S3411 2K Competition HV Servo - Mini, Digital, Coreless, High Precision

Sale price$76.45 Regular price$84.95
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Description

JR PROPO S3411 2K Competition HV Servo - Mini, Digital, Coreless, High PrecisionThe S3411 is the king of precision. Don't take our word for it though, listen to former NASA engineer Jerry Budd talk about the results of his independent servo centering tests in the July '22 K Factor " the JR 9411 and 3421 being clearly the best at centering, albeit much slower I recently tested the new JR 3411 Comp 2K servo and it approaches the JR 3421 in terms of centering, but at a much higher speed and slightly greater torque output." Jerry

The S3411 is the king of precision. Don't take our word for it though, listen to former NASA engineer Jerry Budd talk about the results of his independent servo centering tests in the July '22 K Factor

"...the JR 9411 and 3421 being clearly the best at centering, albeit much slower... I recently tested the new JR 3411 Comp 2K servo and it approaches the JR 3421 in terms of centering, but at a much higher speed and slightly greater torque output."   -Jerry Budd, Former NASA Engineer and Pattern Masters 2nd Place NATS Finisher

The JR PROPO S3411 “Competition" Servo adds a CNC upper metal case, increasing rigidity where it counts the most, at the top of the servo. Expect reduced stress and overall longer life span of the gear train.

This servo has a metal B (second) gear 

JR PROPO is Back
JR PROPO has always been known for quality. They are truly one of the all time great brands in RC flown by world champions in just about every discipline you can image. Now, with new ownership to lead them into the future combined with the winning mentality of the past, JR PROPO is poised to once again impress the true meaning of Japanese quality and precision upon the world of modeling.

Specifications

Torque [6.6V] 5.9 kg-cm / 82 oz-in
[7.4V] 6.6 kg-cm / 92 oz-in
[8.4V] 7.5 kg-cm / 104 oz-in
Speed [6.6V] 0.18 sec/60°
[7.4V] 0.16 sec/60°
[8.4V] 0.14 sec/60°
Weight 32 g / 1.13 oz
Dimensions (LxWxH) 26.5 x 15 x 33 mm
1.04 x 0.59 x 1.30 in
Operating Voltage 4.5 V - 8.5 V
Servo Lead Length 300 mm
11.8 in
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89776078521

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4.5 ★★★★★
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Verified Purchase
KNE
Lexington, US
★★★★★ 5
comfortable
Size: 7 Big Kid, Color: Black/Black
super comfortable!
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Reviewed in the United States on May 30, 2026
M
Verified Purchase
Mike Summers
Chelsea, US
★★★★★ 5
Great shoes
Size: 5 Big Kid, Color: Navy/Blue
Loved them but bought a size too small so had to buy another pair…my bad 🤦🏽‍♀️
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Reviewed in the United States on May 20, 2026
T
The Pacific Northwesterners
Lake Worth, US
★★★★★ 4
Comfortable and Easy to Wear Daily
Size: 2 Little Kid, Color: Navy/Blue
My daughter has been wearing these navy/blue shoes since the weather has been less rainy and more sunny. They are great for outdoor play, especially on days when it's warm outside. The knit mesh upper keeps her feet from overheating, and the cushioned insole feels supportive without being stiff. At size 2, the fit is accurate and the width runs a bit roomy, which gave her some growing room without feeling loose. The slip-on design with elastic laces and pull tabs is a real plus. She can get them on and off without any help, which she loves. The shoes are light enough that she barely notices them during long active days. My one small complaint is that the sole feels more like firm foam than rubber, so they can be a little slippery on smooth indoor floors. For the price, these deliver solid everyday value. They look good, hold up well to regular use, and my daughter reaches for them first most mornings. Pros: - Breathable mesh keeps feet cool - Easy slip-on design with elastic laces and pull tabs - Lightweight and comfortable for all-day wear - Accurate sizing with a roomy width - Durable for the price Cons: - Sole can be slippery on hard smooth surfaces - Limited outsole grip compared to rubber-soled shoes
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Reviewed in the United States on June 1, 2026
D
DR
West Palm Beach, US
★★★★★ 5
Great kids' shoe — easy on, comfy all day
Size: 3 Little Kid, Color: Pink/Lavender
My kid has been wearing these for a few weeks now and I'm genuinely impressed with how well they've held up. The knit mesh upper keeps feet cool and comfortable during long days at school and outdoor play, and the cushioned EVA midsole does a great job absorbing impact. What really won me over is the slip-on design with elasticated laces and dual pull tabs — my child can put them on and take them off completely independently, which is a huge win. The fit is snug but not tight, and they run a bit roomy in width, which is great for kids with wider feet or those who need a little growing room. At $32, the quality feels solid for the price. Lightweight, breathable, and easy to wear — these check all the boxes for an everyday kids' shoe.
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Reviewed in the United States on May 23, 2026
M
Melissa
Omaha, US
★★★★★ 5
Cute, Comfortable, Light-Weight Shoes, Perfect for School
Size: 11 Little Kid, Color: Pink/Lavender, Size: 11 Little Kid, Color: Pink/Lavender
These have turned out to be great everyday shoes for my 5 year old. She normally wears a size 10, but since that size wasn’t available, I ordered the 11 expecting her to grow into them. I was pleasantly surprised that they already fit her pretty well. There’s still a little extra room in the toe area, but the shoes fit securely around her ankles so they don’t feel loose or slip off while walking or playing. She says they’re very comfortable and loves how easy they are to slip on by herself. The lightweight design is nice for everyday wear, and they’ve held up well so far despite being worn almost daily. They've become her favorite shoes to wear! Also the pink/lavender color is really pretty in person. Overall, I’m very happy with them and would order again.
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Reviewed in the United States on May 13, 2026

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