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).

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1:12 Scale RC Cars 903 RC Monster Truck, 38 km/h Speed Hobby Fast RC Cars for Kids and Adults Toy Gifts, 2.4 GHz 4WD Electric Powered Remote Control Trucks Ready to Run 40+ Min Playtime

Product ID: 479313169

⚡38 km/h top speed

🌍4WD all-terrain off-road power

🔋40+ min playtime dual batteries

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Description

🚀 Unleash your inner racer with the HAIBOXING 903 – where speed meets rugged adventure!

RACE READY SPEED - Hit thrilling 38 km/h speeds that leave the competition in the dust ⚡
PRECISION CONTROL - Full proportional steering & throttle with 2.4 GHz radio for interference-free multi-racer battles 🎮
MASTER EVERY TERRAIN - 4WD with aluminum oil-filled shocks conquers gravel, sand, grass, and concrete 🌍
ENDLESS PLAY SESSIONS - Dual 7.4V Li-ion batteries deliver over 40 minutes of non-stop outdoor fun 🔋
BUILT TO LAST UPGRADE - Durable metal gears, ball bearings, and easy maintenance keep your RC truck race-ready season after season 🔧

The HAIBOXING 1:12 Scale RC Monster Truck combines a powerful 390 motor and 4WD drivetrain to reach speeds up to 38 km/h. Equipped with dual 7.4V 1500mAh Li-ion batteries, it offers over 40 minutes of continuous play. Its robust build features metal gears, aluminum oil-filled shocks, and 16 ball bearings for superior durability and off-road performance. The 2.4 GHz radio system ensures precise, interference-free control up to 280 feet, making it perfect for both kids and adults seeking high-speed outdoor fun and competitive racing.

Specifications

ASIN	B0BCGR253J
Additional Features	Portable
Age Range Description	Kid
Are Batteries Required	Yes
Batteries are Included	Yes
Battery Description	Lithium-Ion
Best Sellers Rank	#70,129 in Toys & Games ( See Top 100 in Toys & Games ) #125 in Hobby RC Trucks
Brand Name	HAIBOXING
Color	903
Customer Package Type	Box
Customer Reviews	4.5 4.5 out of 5 stars (843)
Included Components	Battery, Charger, Product Manual, Remote, Screwdriver
Indoor Outdoor Usage	Outdoor
Is Assembly Required	No
Item Dimensions	13.4 x 11 x 6.7 inches
Item Type Name	RC Trucks
Item Weight	4.5 Pounds
Manufacturer	Shantou Haiboxing Technology&Education Model Co., Ltd.
Manufacturer Maximum Age (MONTHS)	1188
Manufacturer Minimum Age (MONTHS)	96
Manufacturer Part Number	903
Manufacturer Warranty Description	30 Day Warranty Against Manufacturer Defects
Material Type	Aluminum, Metal, Plastic
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 x 13.4 x 6.7 inches
Subject Character	Monster
Theme	car, off-road, train, truck
Toy Vehicle Form	Truck
Unit Count	1.0 Count

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$332.57

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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