HAIBOXING Metal Spur Gear Drive Pinions and Diff Complete - RC Spare

In this review the focus is on the HAIBOXING Metal Spur Gear Drive Pinions and Diff Complete, a replacement set intended for HBX 18859A, 18859, 18858 and 18868 models. The bottom line: this is a practical, original spare-part kit for hobbyists who want a durable gear train replacement that fits 2021 new-version cars. The review finds the metal construction and correct tooth count deliver reliable meshing and longevity compared with cheap plastic alternatives, making it the best option for users repairing worn transmissions or restoring drivetrain performance.

Key Features

• Original spare part: Being an OEM replacement ensures fit and compatibility with HBX 18859A, 18859, 18858 and 18868 chassis without guesswork.
• Metal construction: The metal spur gear and pinions increase durability and resist wear under load compared with stock plastic gears.
• Complete set: The package includes the Spur Gear (28.5mm, 57T) and matching drive pinions M19012 and M19021, so users receive all primary components needed for a gear-train rebuild.
• 2021 new version fit: Specified for the 2021 new version of the models, reducing the risk of misfit across minor model revisions.
• Ready quantity: Supplied as a single set, which is convenient for one repair job without hunting separate parts.

Who It's For

This kit is aimed at RC enthusiasts who own HBX 18859A, 18859, 18858 or 18868 models and need an authentic replacement for worn drivetrain parts. It suits hobbyists comfortable disassembling the transmission and replacing gears to restore smooth power delivery and reduce slop.

It is less suitable for casual users who prefer plug-and-play modules or who do not want to perform a gearbox rebuild; those buyers should seek full gearbox assemblies or professional service instead.

Pros & Cons

Pros

• Metal gears provide noticeably improved wear resistance over factory plastic parts for longer service life.
• Direct compatibility with multiple HBX model numbers removes uncertainty when ordering replacements.
• The set contains the primary spur gear and the correct pinions, simplifying repairs without extra parts.

Cons

• Requires some mechanical skill to install properly, so beginners may need guidance or tools.

Specifications

Our Verdict

The HAIBOXING metal spur gear and pinion set is a straightforward, value-oriented replacement for owners of the specified HBX models who want a durable, OEM-fit repair. It delivers stronger gearing and correct specifications for the 2021 new version, making it a sensible investment for anyone rebuilding a worn drivetrain and who can handle basic gearbox work.

Frequently Asked Questions

Will this fit my HBX 18859?
Yes. The set is specified for HBX 18859, 18859A, 18858 and 18868 and matches the 2021 new-version gear dimensions.

What is included in the set?
The package includes the metal spur gear (28.5mm, 57T) plus drive pinions with spare part numbers M19012 and M19021 as a complete set.

Is installation difficult?
Installation requires disassembling the gearbox and basic tools; hobbyists with transmission experience should manage it, while novices may prefer professional help.