Upgrade your TRX4M or TRX4MT with serious width, strength, and climbing stability.
The INJORA CNC Aluminum +4mm Extended Axles add 4mm of width per side (8mm total), giving your rig a wider track for improved side-hilling, better stability, and enhanced overall performance. These come fully pre-assembled with hardened steel internals, extended housings, and brass hexes—ready for installation.
Designed for maximum compatibility and durability, these axles provide a true extended-housing upgrade (not just longer dogbones), preventing binding and ensuring reliable long-term performance on extreme terrain.
⭐ Features
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Pre-assembled complete axles — grease recommended before installation
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+4mm wider per side (+8mm total track width)
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Full extended housing design reduces dogbone strain
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Improved climbing stability & side-hill performance
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Hardened steel CVD shafts & 12/24T steel gears
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Includes +1mm brass 5mm wheel hexes and nuts
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CNC-machined aluminum housings, black anodized
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High precision fit & excellent workmanship
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Same gear ratio as stock (24/12 = 2:1)
🔧 Compatibility
Fits INJORA and Stock TRX4M Chassis, including:
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Chassis links
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Diff covers
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Gears
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Servo mounts
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C-hubs & steering knuckles
❌ Not compatible with:
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Stock TRX4M steering links
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Stock TRX4M dogbone shafts
(Extended housings require longer links/shafts.)
📐 Specifications
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Part Number: 4M-61
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Housing Material: Aluminum
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Gear Material: 20CrMo alloy steel
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CVD Shafts: Hardened steel
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Gear Ratio: 24/12 (2:1 — stock equivalent)
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Total Length: 122mm (4.80")
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Front Axle Weight: 48g (1.69oz)
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Rear Axle Weight: 42g (1.48oz)
📦 Includes
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(1) Extended Front Axle Assembly
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(1) Extended Rear Axle Assembly
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(2) Brass 5mm (+1mm) Wheel Hexes
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(2) Wheel Nuts
