HAIBOXING 1:18 RC Cars Spare Parts — Metal Spur Gear Drive Pinions & Diff Complete for 18859A/18859/18858/18868

Upgrade your 1:18 HAIBOXING rig with a durable metal gear and diff set

This HAIBOXING spare parts kit combines a robust metal spur gear drive pinions and a complete diff assembly, designed for select HBX 1:18 models. Rather than relying on standard plastics, the metal construction delivers a solid feel when the drivetrain engages, helping the vehicle respond crisply to throttle input and maintain consistent performance across rocky surfaces and smooth pavement alike. The set is framed to suit enthusiasts who value reliability and a precise gear mesh for longer runs and more confident handling.

Compatibility is a key focus. The kit is intended for HBX 18859A, 18859, 18858, and 18868 variants, making it a versatile upgrade for several widely used HBX platforms. Whether you’re repairing a worn drivetrain after a day of bashing or refreshing an aging kit, this complete replacement helps you get back on the track quickly without sacrificing control or torque delivery.

What’s included and where it fits

• Spare Part Number: M1901*2 + M1902*1
• Item Name: Metal Spur Gear Drive Pinions and Diff Complete (New Version)
• Quantity: a complete set
• Original spare part, 100% applicable
• Apply to HBX 18859A, 18868, 18859, 18858

Key specifications you’ll notice

• Main Gear: diameter 28.5 mm
• Mould: 0.5
• Teeth: 57T

Why choose a metal gear set?

• Enhanced durability under demanding driving conditions, with a steadier torque transfer
• Greater resistance to wear and heat generated by repeated gear engagement
• Consistent performance across a range of terrains, from loose gravel to smooth asphalt
• OEM-grade fit that keeps the drive train aligned and responsive

Tips for installation and care

• Power off the model and remove the battery before work
• Inspect gear teeth for alignment and clean any debris before fitting
• Torque fasteners to the manufacturer’s guidelines to avoid gear binding
• Regularly inspect the diff and pinions after intense sessions to catch wear early

This kit offers a practical way to refresh a damaged or worn drivetrain, with a focus on reliability and smoother gear engagement. It’s a suitable option for owners who want a capable upgrade that aligns with existing HBX parts while preserving control during aggressive driving scenarios.