Best INJORA Upgrades for SCX24: Top Picks
The SCX24 is a capable 1/24 scale rock crawler, but its true potential is unlocked through quality upgrades. INJORA, known for precision engineering, offers components that transform stock performance into competition-grade capability. This guide covers the most impactful INJORA upgrades-portal axles, wheels, gearboxes, suspension, and body shells-with real-world fitment notes, performance gains, and budget considerations.
Introduction to SCX24 Upgrades
Why Upgrade Your SCX24?
The stock SCX24 is a solid base, but it's designed for general use-not extreme rock crawling or high-speed trail runs. Upgrading brings several key benefits:
- Increased Ground Clearance: Portal axles add 1-1.5 inches of lift, letting the rig clear larger obstacles without body damage.
- Improved Traction: High-grip crawler tires and upgraded suspension articulation prevent wheel spin on loose rock and dirt.
- Enhanced Durability: Aluminum and steel replacements handle impacts better than plastic OEM parts, reducing breakage during aggressive runs.
- Custom Aesthetics: Aftermarket bodies and wheels let you tailor the look-from military olive drab to modern matte black or even custom liveries.
- Precision Handling: Upgraded gearboxes and suspension components reduce slop and improve steering response, crucial for tight trail sections.
If your SCX24 spends time on rocky trails or in competitions, upgrades aren't optional-they're necessary to stay competitive and avoid frequent repairs.
Overview of INJORA Upgrades
INJORA specializes in high-tolerance CNC-machined aluminum and steel parts for 1/24 RC crawlers. Their product line for the SCX24 includes:
- Portal Axles: Replace the standard axles with 4-link portal setups for maximum lift and durability.
- Crawler Wheels: 1.9-inch or 2.2-inch beadlock-style wheels with high-traction rubber for off-road grip.
- Gearboxes: Metal gear upgrades with sealed bearings and reduced backlash for smoother power delivery.
- Suspension: Aluminum shock towers, hinges, and links for improved articulation and reduced flex.
- Body Shells: Realistic, scale-accurate bodies with reinforced mounting points and clearcoat protection.
INJORA parts are designed to fit OEM mounting points, minimizing modification needs. Their components are widely used in competitive 1/24 crawling circuits due to their balance of strength, weight savings, and precision.
Top INJORA Parts for SCX24
Portal Axles
INJORA's portal axle kits replace the stock differentials with 4-link portal units. This design raises the driveshafts above the axles, increasing ground clearance and protecting drivetrain components from impacts.
The standard SCX24 sits at about 2.5 inches of clearance. With INJORA portals, clearance jumps to 3.8-4.2 inches, depending on tire size. This allows the rig to traverse obstacles like large rocks, logs, or ruts that would stall a stock unit.
Key Features:
- 4-link suspension for improved articulation
- High-strength aluminum construction with steel shafts
- Precision-machined gear housing with sealed bearings
- Fits OEM mounting points-no chassis modifications needed
- Available in 2.0 and 2.2-inch width options
Pros and Cons:
Pros:
- Adds 1.3-1.7 inches of ground clearance
- Reduces drivetrain wear from impacts
- Improves approach and departure angles by up to 10 degrees
- Compatible with most 1.9-2.2-inch tires
- Backed by 1-year warranty
Cons:
- Adds ~150g per axle (7% weight increase)
- Slightly reduced top speed due to gearing
- Installation requires careful alignment
- Higher initial cost than OEM replacements
Best for: Rigid rock crawlers pushing technical terrain, competitive events, or users who want maximum durability under load.
Crawler Wheels
INJORA's crawler wheels are designed for off-road grip and durability. They use a 1.9-inch or 2.2-inch beadlock-style rim with high-traction rubber compounds optimized for rock and dirt.
The beadlock design secures the tire bead to the rim under pressure, preventing tire burping during extreme articulation-a common issue with standard tires on rock crawlers.
Key Features:
- 1.9-inch and 2.2-inch rim sizes available
- Aggressive 6-lug or 8-lug pattern for mud and rock
- Reinforced aluminum center with steel outer ring
- Tire compounds optimized for 15-35 Shore A hardness
- Hub adapter included for direct fitment to SCX24 axles
Pros and Cons:
Pros:
- Prevents tire burping in extreme articulation
- Durable rubber resists cuts and punctures
- Improves traction by 25-30% on loose terrain
- Available in matte black or silver finish
- Compatible with most 1/24 RC crawler bodies
Cons:
- Heavier than stock tires (~80g per tire)
- Limited tread options for pavement use
- Requires careful balancing for high-speed runs
- Higher price point than entry-level tires
Best for: Technical rock crawlers, competitive events, or users who prioritize off-road grip over pavement performance.
For a deeper dive into INJORA wheels, see our full INJORA Crawler Wheels Review.
Gearbox
INJORA's gearbox upgrade replaces the stock plastic gearset with a full metal assembly featuring sealed ball bearings and hardened steel gears. This reduces backlash, increases torque capacity, and improves efficiency.
The stock gearbox on the SCX24 uses nylon gears with bronze bushings, which wear quickly under heavy loads or aggressive driving. INJORA's solution uses 3.0mm thick steel gears with 6mm shafts and dual sealed bearings on input and output shafts.
Key Features:
- Full metal gearset with 13T/38T ratio (stock: 15T/36T)
- Sealed 6802RS and 6901RS ball bearings (6x19x6mm and 12x21x5mm)
- Hardened steel gears with 3.0mm thickness
- Aluminum housing with integrated motor mount
- Compatible with 370-size brushed and brushless motors
Pros and Cons:
Pros:
- Reduces gear backlash by 50%
- Increases torque capacity by 30%
- Extends gear life under heavy loads
- Improves efficiency, extending battery life by 10-15%
- Lower operating temperature than stock gearbox
Cons:
- Adds ~45g of weight
- Higher initial cost than replacement plastic gearsets
- Requires precise motor alignment
- Not compatible with 540-size motors without adapters
Best for: Aggressive rock crawlers, competitive events, or users who push their rigs to the limit.
INJORA's gearbox is ideal for rebuilt stock rigs or upgraded builds where drivetrain reliability is critical.
Suspension
INJORA's suspension kit replaces the stock plastic shock towers, hinges, and links with CNC-machined aluminum components. This reduces flex under load, improves articulation, and increases overall rigidity.
The stock suspension on the SCX24 uses thin plastic arms and hinge pins that flex under heavy loads, especially during high-speed runs or on uneven terrain. INJORA's suspension eliminates this flex, improving handling and reducing body roll.
Key Features:
- CNC-machined 6061-T6 aluminum shock towers and arms
- Hard-anodized finish for corrosion resistance
- Precision-machined hinge pins with brass bushings
- Adjustable link lengths for fine-tuning suspension geometry
- Compatible with most 1/24 RC shock absorbers
Pros and Cons:
Pros:
- Reduces suspension flex by 60%
- Improves articulation by 15-20%
- Increases overall rigidity by 25%
- Prevents arm breakage during extreme runs
- Compatible with most 1/24 RC shock absorbers
Cons:
- Adds ~120g of weight
- Higher cost than stock suspension components
- Requires disassembly of the rig for installation
- Not compatible with some aftermarket shocks
Best for: Technical rock crawlers, competitive events, or users who prioritize handling and durability over weight savings.
If you're comparing suspension options, our INJORA vs Axial guide covers how these upgrades stack up against other brands.
Body Shells
INJORA's body shells are designed to fit the SCX24 chassis while offering realistic scale details, reinforced mounting points, and durable materials. They're ideal for users who want to customize the look of their rig without sacrificing durability.
The stock SCX24 body is functional but lacks scale details and durability. INJORA's bodies are made from high-impact ABS plastic with a clearcoat finish, providing a realistic look and improved resistance to scratches and impacts.
Key Features:
- Scale-accurate body with realistic details
- High-impact ABS plastic with clearcoat finish
- Reinforced mounting points for durability
- Available in multiple colors and styles
- Pre-drilled for easy installation
Pros and Cons:
Pros:
- Improves the realistic appearance of the rig
- More durable than stock body
- Available in multiple colors and styles
- Easy to install with pre-drilled mounting points
- Compatible with most 1/24 RC accessories
Cons:
- Adds weight (~90g for a typical body)
- Limited customization options compared to 3D-printed bodies
- Clearcoat can wear off over time with heavy use
- Higher cost than stock body replacements
- Not as durable as metal bodies
Best for: Users who want to customize the look of their rig while improving durability and realism.
INJORA's body shells are ideal for users who want to stand out on the trail or in competitions.
Installation Tips
Tools Needed
Installing INJORA upgrades requires basic RC tools and patience. Here's what you'll need:
- Hex Drivers: 1.5mm, 2.0mm, and 2.5mm Allen keys for removing and installing screws
- Phillips Screwdriver: #0 or #1 for removing body and electronics screws
- Needle-Nose Pliers: For removing and installing small clips and pins
- Tweezers: For handling small components and washers
- Small Wrenches: 5mm and 6mm for adjusting suspension links
- Threadlocker (Optional): Blue Loctite for securing screws and preventing loosening
- Grease: Lithium grease for lubricating gears and bearings
- Ruler or Calipers: For measuring suspension link lengths
- Screw Holder: Magnetic tray or holder for keeping screws organized
Pro Tips:
- Label screws and components during disassembly to simplify reassembly
- Use a torque screwdriver for critical components to prevent over-tightening
- Check alignment after installing portal axles to ensure proper drivetrain engagement
- Lubricate gears and bearings before installation to reduce wear
- Test fit components before final installation to ensure proper fitment
Step-by-Step Guide
Installing INJORA upgrades is straightforward but requires attention to detail. Below is a general guide for installing the most common upgrades. Always refer to the manufacturer's instructions for specific details.
1. Portal Axles Installation
- Disassemble the Rig: Remove the body shell, electronics, and wheels. Place screws in a labeled container.
- Remove Stock Axles: Use a 2.5mm hex driver to remove the screws securing the stock axles to the chassis.
- Install Portal Axles: Align the portal axles with the OEM mounting points. Secure them using the provided screws, ensuring proper alignment with the driveshafts.
- Adjust Driveshafts: Check that the driveshafts are aligned and not binding. Adjust as needed to ensure smooth operation.
- Reinstall Wheels and Electronics: Reattach the wheels and electronics, ensuring all connections are secure.
- Test Fit and Alignment: Drive the rig briefly to ensure proper alignment and check for any binding or unusual noises.
2. Crawler Wheels Installation
- Remove Stock Wheels: Use a 2.0mm hex driver to remove the screws securing the stock wheels to the axles.
- Install Wheel Adapters: If using