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UDIRC SIERRA MAX UD1002P 1/10 4WD Brushless RTR RC Trophy Truck

2S/3S Compatible4WD60A ESCBrushlessCenter DifferentialRTR
Sale price$399.99 USD Regular price$559.99 USD
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CodeK4JA93T9B41Y

Re-stocking on August 22, 2026
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Order now—our next batch is expected to arrive in the U.S. around September 5, 2026, and orders will ship in the order received.

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How Big Is the SIERRA MAX RC Truck?

UD1002P vs UD1002SE

More Than a Similar Look

While the UD1002P may look similar to the previous UD1002SE at first glance, it features key upgrades in drivetrain, durability, handling, lighting, and body material. These improvements are designed to deliver a stronger, more reliable, and more exciting desert truck experience.

Model

UD1002SE

UD1002P

Differential Type

Standard differential setup

Sealed front and rear differentials

Center Differential

Semi-metal center differential

Full-metal center differential

Rear Differential

No rear differential

Sealed rear differential

Front CVD

Standard front CVD

Reinforced front CVD

Tires

TPR tires

Rubber tires

Center Driveshaft

Nylon center driveshaft

Steel center driveshaft

Dark Version Hydraulic Adjustable Shocks with Damping

These hydraulic shocks feature adjustable damping and are designed for smooth, tunable suspension performance. Each shock measures approximately 115 mm in total length, with an eye-to-eye mounting hole distance of about 108 mm.

Double Shock Absorber

Oil-Filled adjustable metal shock absorber and Oil-Filled damper, intelligently filters high-frequency vibrations, maintains vehicle stability, simulating the smooth sensation of a real vehicle.

Sealed Front & Rear Differential Set

Sealed front and rear differentials, pre-filled with 30,000 cSt diff oil for consistent traction and smoother power delivery. Built with 1M steel gears, including a 37T ring gear and 13T pinion gear for improved durability and reliable drivetrain performance.

Aluminum Center Differential Housing with Steel Gear Center Diff

Aluminum Center Differential Housing with Steel Gear Center Diff

Aluminum alloy center differential housing paired with a steel gear center differential for improved strength and drivetrain durability. Pre-filled with 100,000 cSt diff oil for stable power delivery and controlled traction.

Built with 0.8M steel gears, including a 58T spur gear and 15T motor pinion gear.

Front Differential System

Featuring bevel steel gears for positive engagement, it enables precise speed control during cornering maneuvers. Minimizes gear wear while maximizing longevity of the transmission system.

Cage-Type Roll Cage

A 3D protective framework constructed from high-strength nylon decomposes kinetic energy during rollover impacts, with core components delivering indestructible protection.

Rear Differential System

Featuring bevel steel gears for positive engagement. Multi-Link Rear Straight Axle‌, based on bionic principles, the multi-joint linkage structure absorbs impacts multidirectionally, while the straight axle design enhances overall rigidity. On bumpy terrain or when landing after jumps, it maintains body stability and minimizes rebound amplitude. Ideal for off-road racing tracks, it ensures model cars traverse high-speed sections as if on level ground.

Universal ESC mount, compatible with most ESCs

Nylon Wheels with Rubber Tires

The updated tire set features durable nylon wheels paired with rubber tires for reliable grip and wear resistance. It uses 12mm hex adapters for easy installation and measures 116 x 45mm, making it suitable for compatible RC models and upgrade setups.

Optimized Chassis Performance

The chassis layout is designed to improve overall driving performance, offering better stability, smoother power delivery, and more reliable handling across different road conditions. It helps enhance control during acceleration, cornering, and high-speed runs, making the vehicle more responsive and easier to drive.

Steel Drive Shafts


The steel drive shafts provide improved drivetrain strength and more stable power transfer compared with standard components. Their durable steel construction helps reduce flex under load and improves reliability during high-speed running and off-road use.

Upgraded Steel CVD

The upgraded steel CVD are designed to deliver smoother steering movement and more efficient power transfer to the wheels. Their reinforced steel construction improves durability under load, helping the drivetrain maintain reliable performance during acceleration, cornering, and rough-road driving.

Controllable RGB Front and Roof Light Bars

The vehicle is equipped with controllable RGB light bars at the front and on the roof, adding a more realistic and eye-catching look for night runs or display setups. Multiple lighting modes and color options are available, allowing users to customize the lighting effect to match different driving scenes.

*The light button is easy to operate: short press to switch lighting modes, and long press to change colors.

DumboRC X5E Transmitter with Gyro Receiver

The vehicle is equipped with a DumboRC X5E transmitter and a gyro receiver for improved driving stability and easier control. The gyro function helps keep the vehicle more stable in a straight line and reduces unwanted steering correction, making it easier to handle during acceleration, cornering, and high-speed runs.

Remote Light Control

The lighting system can be controlled directly from the transmitter, allowing users to switch lighting modes and adjust light colors more conveniently during operation. This makes the vehicle easier to customize for night driving, display setups, and different driving scenes.

Transmitter Power Switch

Steering Wheel Control

The steering wheel provides precise left and right steering control, allowing the driver to make smooth directional adjustments during operation.

Throttle and Brake Control

Steering Trim Adjustment

Throttle Trim Adjustment

Steering Dual Rate Adjustment

Gyro Sensitivity Adjustment

Throttle Dual Rate Adjustment

Channel Reverse Switches

Telescopic Central Drive Shaft
01

Telescopic Central Drive Shaft

Forged from high-strength steel, it achieves omnidirectional rotation without dead angles. Efficiently transmits high-torque power, minimizes energy loss on complex terrains, and extends transmission system lifespan.

Central Differential‌
02

Central Differential‌

Featuring ‌precision-forged steel bevel gears‌ for ‌positive engagement‌, it ‌dynamically responds to terrain variations‌ and ‌autonomously modulates front/rear torque distribution‌. ‌Delivers enhanced traction‌ during extrication scenarios while ‌significantly enhancing off-road capability‌ and ‌virtually eliminating drivetrain hesitation‌ – empowering your model to conquer complex obstacles with confidence.

Central Differential Housing‌
03

Central Differential Housing‌

Fabricated from aluminum alloy‌ using ‌monolithic CNC machining‌, it achieves ‌micron-level tolerance control‌. This ‌enhances structural rigidity‌ and ‌dampens operational vibrations‌. Engineered to ‌withstand high-load scenarios‌ such as jumps or impacts, it ‌delivers reliable power transmission‌ as the core drivetrain hub.

Technical specifications

Vehicle SPECS

Vehicle SPECS

Vehicle Name:
SIERRA MAX
Vehicle Model :
UD1002P
Vehicle Scale:
1/10
Vehicle Type:
Short-Course Truck
Vehicle Suspension:
Independent Suspension
Vehicle Size:
L600×W300×H250mm
Vehicle Weight:
5kg
Vehicle Front wheel track:
240mm
Vehicle Rear wheel track:
247mm
Vehicle Wheelbase:
345mm
Vehicle Ground clearance:
about 56mm
Vehicle Power type:
Electric
Vehicle Speed:
40-60km/h
Vehicle Transmission mode:
Spindle transmission
Vehicle Differential:
Metal Differential
Vehicle Drive system:
4 wheel drive
Vehicle Drive type:
Adjustable
Vehicle Tire diameter:
ø115.8×44.9mm
Vehicle Wheel adapters:
12mm, metal
Vehicle Body:
PC
Vehicle Battery compartment capacity:
L140×W30×H45mm
Vehicle Main spur gear:
0.8m, 58T
Vehicle Bevel gear:
1m, 13T
Vehicle Servo:
3-line, 35kg torque
Vehicle Car lights:
Included
MOTOR SPECS

MOTOR SPECS

Motor Model:
P10-071B
Motor Type:
Brushless motor
Motor Weight:
About 254g
Motor Size:
3660-2700KV
Motor Rated voltage:
7.4-11.1V DC
Motor Output shaft:
ø5mm
Motor Connector Type:
4.0mm banana connector
Motor Limit:
2-3S LiPo
ESC SPECS

ESC SPECS

ESC Model:
P10-072
ESC RF Standard:
2.4GHz
ESC Input Power:
2-3S
ESC Rated current:
60A
Power Connector:
XT60

Transmitter

Transmitter Model:
P10-3032
Transmitter Control Type:
Proportional
Transmitter Frequency Band:
2.4GHz
Transmitter Control Distance:
About 100m
Transmitter Channels:
5
Transmitter Iput Power Method 1:
1.5V AA Battery x 4pcs
Transmitter Iput Power Method 2:
7.4V Battery with connector type JST-2P
Receiver

Receiver

Receiver Model:
P10-073
Receiver RF Standard:
2.4GHz
Receiver Input Voltage:
4.8-10V DC
Receiver Size:
35×21×14mm

Customers praised this RC trophy truck as "a masterpiece in mechanical engineering" with excellent build quality and "mesmerizing" suspension performance. Reviewers highlighted its durability, speed, and scale desert racing capabilities. Some noted traction roll tendency and suggested the 60amp ESC could be upgraded for optimal performance.

  • A masterpiece in mechanical engineering! The shell is gorgeous, incredibly rigid fortress.
  • One of the most engaging RC's to drive. Watching the suspension is almost mesmerizing.
  • The quality is excellent. From the electronics to the powertrain everything is well done.
Chassis (positive)Quality (positive)Motor (positive)Suspension (positive)Durability (positive)
  • 5 stars: 10 (91%)
  • 4 stars: 1 (9%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
JAMES BURROUGHS (United States)
How fast is this RC car?: Very fast
A masterpiece in mechanical engineering!!!

I don't know where to begin. The shell is gorgeous metal flake with a lovely white pearl contrast. I disassembled the entire machine a reassembled it. I found it to be well thought out a very meticulous. All the part together form an incredible ridged fortress. The wheel tires and motor are perfectly matched. The Max is a monster. I am amazed at how strong the chassis is. I have pounded this unit through numerous batteries and have yet to make any repairs or adjustment. It drives so precisely and smooth. The straight rear axel will create traction roll but that is going to happen with any straight axel vehicle. The Max can handle it well if you learn haw to finesse her. She loves to go through nasty rugged terrain that other vehicles will fear. The caged body and strong shell make for a supper tough truck. She is super fast for a 3S RC.I have run several 2S packs as well and it loves them as well. I have 37 RC at present and I consider the Sierra Max to be among my top 3 along with My 1/5 ARRMA Outcast and Mohave 6S V2. I find that this seems to be the first vehicle I grab when I want to go out in the yard and have some fun. I am extremely blessed to live way out in the country and own 60 acres of the most perfect place to bash on. I am simply in heaven. I currently own 6 UDIRC vehicles and I am sure this will not be my last be any means. Thank you for understanding the correct way to introduce a new, insightful and unique way of bringing the marvelous RC vehicles to the world.

All hail to the new LEADERS in the RC world. I think you have made a hell of a splash!!!

B
Byron Sanderson (United States)
How fast is this RC car?: Fast
One of the most engaging RC's to drive

I ordered the car from UDIRC directly and it came quickly. I installed a XC C-10 ESC (120amp) and built a parallel wiring harness before I ran it. I ran it on 2 POVWAY 3s 5200mAh (10800 mAh total) for almost an hour.

I love how it drives, watching the suspension over chunky terrain is almost mesmerizing. The temps stayed decent the whole time and nothing broke. It does smooth smaller jumps very well.

I don't know if I would recommend this as a first car though (it can traction roll pretty easily), but it is a must have in my opinion for someone who has been in the hobby. I got mine on sale with a promo code for $370, which is a bargain IMO. I think it should definitely come with the parallel harness and probably a 120 amp esc at full price though. I will be tuning the diffs soon which I think will improve the traction roll.
I use Dumborc in almost all of my RC's so it coming with one installed was a plus. I will be paring it to my DDF-350 at some point.
Great Desert Truck!

A
Aaron Spicer (Canada)
How fast is this RC car?: Fast
This is a great truck.

This is my 5th UDIRC product. Each time I am rather suprised with performance and durability and value. It only has a 60amp esc which isn't enough in my opinion but out of the box it performs good and the design is fantastic. The motor and esc get good airflow, the suspension is awesome, I just needed a bit more preload adjustment. I put a sticker over the exposed rear bearing on the motor to keep dust and dirt from ruining that bearing. There is an empty spot where a second battery jumper can go, it should be provided since there are 2 battery trays, why not have the option to connect both batteries?
This truck is a direct competitor to the Traxxas UDR and Losi Baja Rey and at half the price it is a very good starting point. I have added the 10BL120 esc because I want my truck to run on dual 3000mah 4s packs and dual 5000mah 3s packs. The 2700kv motor seems adequate but at that kv, 4s is perfect. Maybe a tool that less on the pinion if running 4s. Right out of the box it ran great, but I do have another weak point. The exo cage under the body has a bit too much flex at the rear of the chasis. There is a bit of weight in the 2 full size spare tires and the plastic fuel cell that the cage flexes a bit too much in my opinion. The body is great and screws on in 12 places but at the rear its 2 screws and with the flex of the rear cage, it can crack the body at the rear corners. Thicker tube frame in the area from the rear shock mounting location to the fuel cell area? Thats the only issue I have found so far and that is not broken yet so we will see if its an issue at all.
This isn't a stunt truck, it isn't meant to be launched 20 feet in the air, its a scale looking desert racer, and used in a semi scale environment it is fantastic.

M
Marc ANTONIN
How fast is this RC car?: Fast
Tout simplement Génial 🤩

Bonjour à toute l'équipe,

J'ai reçu ce trophy truck en parfaite état et très bien emballé en 11 jours en France.
Ce modèle RC est tout simplement magnifique et de très bonne manufacture, avec les améliorations apporter la souplesse des pneus, sur des suspensions, ainsi que sur le différentiel du pont arrière est génial 😄.
Seul "truc" qui est dommage, est d'avoir abandonné le variateur électronique ESC à double alimentation (double batterie) mais cela n'enlève rien à la beauté du trophy truck.

J'ai effectué un petit test, il est tout simplement époustouflant 🤩.

Merci UDIRC

E
Eugene Rego (United Kingdom)
How fast is this RC car?: Fast
Very happy with Udirc i highly recommend this car to anyone

Very happy with Udirc i highly recommend this car to anyone.

B
Brent

Great truck.very fast.good quality.👍

G
Gregg

This RC car is amazing

K
Ken culpepper (United States)
How fast is this RC car?: Fast
Awesome truck

Awesome truck , Udirc has done a great job with sierre max! Fun, durable trophy truck , I’m very happy with purchase’

M
Mario

The suspension works and reacts like. True deedt racer and quality of the truck is top notch and the body is made of thick durable material

T
Thomas Schultz (United States)
How fast is this RC car?: Very fast
The quality of the udirc Sierra Max is excellent

The quality of the udirc Sierra Max is excellent. The detail is excellent and from the electronics to the powertrain everything is well done. Can't wait to spend hours and hours with it. May even buy a second one.

M
M.M.J.F.

Not driven it properly yet, but from what I have seen it appears to be well built and looks great in person