What is the hex size?

OTB is 14mm..I'd suggest buying Typhon Axles, and hubs, and RPM Front & Rear suspension arms to get 17mm Hex. But at that point, you almost at the price point of the Typhon 6S, and being honest a way better car. Typhon 6S was rated #7 of top 10 RC of 2021. That says alot considering some upper models are $900+

Que clase de batería y cargador necesita

This truck takes a 2 or 3 cell LiPo battery, models: SPMX50003S50H5, SPMX50003S100H5, SPMX50002S50H5 and Spektrum Smart charger models: S2100, S150, S1100. Thanks for asking.

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ARRMA 1/10 Big Rock 4X4 V3 3S BLX Brushless Monster RC Truck RTR (Transmitter and Receiver Included, Batteries and Charger Required), Black, ARA4312V3

ARRMA 1/10 Big Rock 4X4 V3 3S BLX Brushless Monster RC Truck RTR (Transmitter and Receiver Included, Batteries and Charger Required), Black, ARA4312V3

Product ID: 222298462

⚡50+ MPH top speed

🌍All-terrain dBoots RAGNAROK tires

🛠️Reinforced chassis & metal-geared diffs

Description

🚀 Dominate the dirt with unstoppable speed and rugged style!

CUSTOM TUNED CONTROL - Adjustable ride height, body mounts, and turnbuckles let you fine-tune performance for your unique driving style.
ROCK SOLID DURABILITY - Reinforced chassis, metal-geared differentials, and rubber shielded bearings ensure this beast withstands the toughest bashing sessions.
UNMATCHED SPEED THRILLS - Hit exhilarating 50+ MPH speeds that leave the competition in the dust.
BUILT TO CONQUER ANY TERRAIN - Rugged dBoots RAGNAROK tires and wider stance deliver superior grip and stability on grass, dirt, and rocks.
READY TO RUN READY TO DOMINATE - Comes fully assembled with transmitter and receiver—just add batteries and charger to join the elite RC community instantly.

The ARRMA 1/10 Big Rock 4X4 V3 3S BLX Brushless Monster RC Truck is a ready-to-run powerhouse designed for serious bashing. Featuring a reinforced chassis, metal-geared differentials, and all-terrain dBoots RAGNAROK tires, it delivers 50+ MPH speeds with unmatched durability. Adjustable components and a modular design make maintenance and customization effortless, perfect for both beginners and seasoned RC enthusiasts seeking high-performance thrills.

Specifications

ASIN	B08F2KG3S1
Additional Features	Adjustable, Portable
Age Range Description	Ages 14+
Are Batteries Required	Yes
Batteries are Included	No
Battery Description	Not Included
Best Sellers Rank	#402,180 in Toys & Games ( See Top 100 in Toys & Games ) #899 in Hobby RC Trucks
Brand Name	ARRMA
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (873)
Educational Objective	Vehicle Maintenance and Customization
Included Components	(1) Spektrum™ 2.4GHz SLT3™ 3-Channel Transmitter, (1) Spektrum™ Firma™ 3660 3200Kv Brushless Motor, (1) Spektrum™ SLR300 Receiver, (1) Spektrum™ SPMS651 Waterproof* Metal-Geared Digital Servo, Product Manual
Is Assembly Required	Yes
Item Dimensions	20.24 x 14.02 x 7.91 inches
Item Length	20.24 Inches
Item Type Name	RC Truck
Item Weight	7.2 Pounds
Item Width	14.02 Inches
Manufacturer	Arrma
Manufacturer Maximum Age (MONTHS)	1320.0
Manufacturer Minimum Age (MONTHS)	168.0
Manufacturer Part Number	ARA4312V3
Manufacturer Warranty Description	2 Year Limited Warranty
Material Type	Plastic
Model Name	Big Rock 4X4 3S BLX Brushless 1/10th 4wd MT Black
Model Number	ARA4312V3
Model Year	2020
Number of Items	1
Number of Players	1
Operation Mode	Remote Control
Power Source	Electric
Scale	1:10 Scale
Size	25.5 inches
Subject Character	Monster
Theme	Truck
Toy Vehicle Form	Truck
Unit Count	1.0 Count

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