Can the motor be replaced or upgraded?

Thank you for the inquiry. Yes, the motor can be replaced or upgraded to brushless but you need a brushless ESC. We suggest using the factory version motor.

Whats the biggest wheel size i can go up to with the 903a model?

I wouldn’t go much taller because it puts more drag on the motor and makes it hot

Is it possible to get a replacement motor or upgrade it to a different one?

Thank you for the question. Yes, the replacement motor should be a brushed 390 motor or brushless motor which is not larger than the original motor.

What's the battery size compartment? Or what are the dimensions of the batteries that come with 903a?

The battery size is 2S, 1600 mAh 30C 7.4 volts. Battery dimensions are about 1-1/4" x 2-3/4", or about 34 mm x 70 mm, and the compartment is about 1-1/2" x 2-3/4", or 38 mm x 70 mm, with a lot of over-head space (where the cab lines up).

Haiboxing 1 12 Scale Rc Cars 903 Rc Monster Truck

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🚀 Dominate Every Terrain with Power, Precision, and Playtime!

PRECISION 4 WD CONTROL - Full proportional steering and throttle with 4-wheel drive for unbeatable maneuverability on any terrain.
RACE READY 38 KM H SPEED - Feel the adrenaline with a top-tier 1:12 scale RC monster truck built for thrill seekers.
EXTENDED DUAL BATTERY POWER - Over 40 minutes of uninterrupted off-road action with two high-capacity Li-ion batteries.
RUGGED DURABILITY MEETS STYLE - Aluminum oil-filled shocks and metal drivetrain components ensure stability and resilience against every bump.
SPLASH RESISTANT MULTI PLAYER READY - IPX4 water resistance and 2.4 GHz interference-free radio system let you race anywhere, anytime, with friends.

The HAIBOXING 1:12 Scale RC Monster Truck delivers a thrilling 38 km/h top speed powered by a robust 390 motor and 4WD drivetrain. Equipped with dual 7.4V 1500mAh Li-ion batteries, it offers over 40 minutes of continuous play. Its aluminum oil-filled shocks and metal gears provide superior durability and shock absorption for all-terrain adventures. Featuring a 2.4 GHz radio system with 280-foot control range and IPX4 splash resistance, this ready-to-run RC truck is perfect for both kids and adults seeking high-performance outdoor fun.

Specifications

ASIN	B0BCGR253J
Additional Features	Adjustable, Portable
Age Range Description	Kid
Are Batteries Required	Yes
Batteries are Included	Yes
Battery Description	Lithium-Ion
Best Sellers Rank	#96,516 in Toys ( See Top 100 in Toys ) #148 in Remote- & App-Controlled Trucks
Brand Name	HAIBOXING
Color	903
Customer Package Type	Box
Customer Reviews	4.5 out of 5 stars 813 Reviews
Included Components	Battery, Charger, Product Manual, Remote, Screwdriver
Indoor Outdoor Usage	Outdoor
Is Assembly Required	No
Item Dimensions	34 x 27.9 x 17 centimeters
Item Type Name	RC Trucks
Item Weight	2.04 kg
Manufacturer	HAIBOXING
Manufacturer Maximum Age (MONTHS)	1188
Manufacturer Minimum Age (MONTHS)	96
Manufacturer Part Number	903
Material Type	Metal Plastic Aluminum
Maximum Speed	38 Kilometers per Hour
Model Name	903
Model Number	903
Model Year	2022
Number of Batteries	1 Lithium Ion batteries required. (included)
Number of Items	1
Number of Players	Multiple
Operation Mode	manual
Power Source	Battery Powered
Scale	1:12 Scale
Size	11 inches (W) x 13.4 inches (L) x 6.7 inches (H)
Subject Character	Monster
Theme	car, off-road, train, truck
Toy Vehicle Form	Truck
Unit Count	1.0 Count

Reviews

R**B

Awesome truck

This thing is very stable and fast. I have an absolute blast with it. Can take a beating, and parts are widely available if needed.

1.02.2023

R**H

It’s fake items don’t buy anyone’s

1 It’s not 1:12 size it’s small 1:18, 2 it’s detailed he have 2 Battery’s but it’s wrong he has 1 small battery. 3 it’s not 4X4 it’s only small moter 4X2 all fake details

8.08.2023

M**Z

Diversión segura 4x4

Se ve excelente, viene con dos baterías se maneja excelente en terraseria y si te gusta usar la rampa adelante pero ten rn cuenta mientras más alto vuela más riesgo de romper algo pero no hay problema ya que aquí mismo encontrarás repuestos, altamente recomendable, si lo compraría otra vez.

30.01.2026

B**N

Absolutely buy this! Its crazy how nice and sturdy it is!

First off this thing has no right to be this good for the price point. I wouldn't normally buy an rc truck off Amazon or anywhere for what this one cost, thinking it would be more of a cheap "toy". Well last week a coworker got one and brought it to work and let 5 mechanics thrash it around for 2 hours and beat the absolute hell out of it. ....it survived. Not only survived but was completely good. Its crazy fast, super capable in the dirt and grass shooting rooster tails, jumping off curbs and parking blocks. Its seriously crazy how nice this thing is. When I say we beat the hell out of it I mean it. I immediately ordered one and it showed up 1 day later and I have zero regrets. Its seriously the most fun and sturdy as can be. We now have 4 other coworkers that bought them and have turned an hour after work into a free for all. The speed controls are really nice too if you have a little one learing it as well. But im telling you dont hesitate at all with this one just buy it.

19.07.2026

L**A

903 Great 1/12 rc truck

Great fun car for the price, decent speed,stable, durable and good quality. my 5 year old loves it and controls it with no problem, great rc truck for beginners also car can be easily upgraded to be faster(brushless setup)

29.05.2026

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€ 480.67

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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