Metal Adapter 5mm to 12mm — Aluminum Alloy Adapter for MN86 WPL D12 C14 C24 B14 B16 MN D90 D91 Truck Upgrade Parts

Upgrade your RC truck drivetrain with a durable, precision adapter that converts 5mm shafts to 12mm fitments. Built from lightweight aluminum alloy, this adapter is designed for modified MN86, WPL, and MN-series trucks that need a stronger, more reliable connection between motor/axle components.

Precision-machined aluminum alloy for high strength and reduced weight
Converts 5mm input shaft to 12mm output hub quickly and securely
Corrosion-resistant finish for long-lasting performance in hobby use
Ideal for modified MN86, WPL D12/C14/C24, B14/B16 and MN D90/D91 trucks

Key benefits

Increase drivetrain compatibility without replacing expensive parts
Improve torque transfer and reduce slop between mismatched shafts
Lightweight upgrade that won’t add unnecessary rotational mass

Compatibility

Direct fit for: MN86, MN D90, MN D91
Compatible with WPL models: D12, C14, C24
Also fits: B14, B16 and many modified RC truck setups that require a 5mm→12mm adapter
Verify your shaft diameters (5mm input, 12mm mating hub) before purchase

Specifications

Material: Aluminum alloy (precision-machined)
Input shaft diameter: 5mm
Output hub diameter: 12mm
Finish: Anodized / corrosion-resistant surface
Package: 1 × Metal Adapter (5mm → 12mm)

Installation & notes

Slide adapter onto 5mm shaft and secure with set screw or retaining hardware (not included depending on model)
Check for tight, wobble-free fit before full operation
Small filing or shimming may be required for third-party hubs — contact a tech if unsure

Why choose this adapter