The FMS FCX18 II F-100 is designed for drivers who value a scale-inspired truck appearance and balanced crawling performance.

Unlike the first-generation FCX18, the FCX18 II F-100 comes equipped with a solid axle setup that delivers a traditional 4x4 look, lower center of gravity, and strong crawling capability.

For drivers looking for more ground clearance and improved obstacle clearance, the FCX18 II F-100 also supports portal axle options.

Quick Answer: Can the FCX18 II F-100 Use Portal Axles?

Yes. The FCX18 II F-100 supports three portal axle solutions:

• Complete Portal Axle Assembly — the easiest bolt-on option for increased clearance.
• Portal Axle Set with Manual Differential Lock — designed for technical crawling and maximum traction control.
• Portal Gear & Parts Kit — a budget-friendly option for builders who enjoy customization.

Solid Axles vs. Portal Axles: What’s the Difference?

Solid Axles — Scale Style & Balanced Crawling

The FCX18 II F-100 uses a solid axle setup to capture the traditional look and driving feel of classic 4x4 trucks.

Advantages:

• Scale-oriented appearance
• Lower center of gravity for improved stability
• Direct power transfer with strong torque delivery
• Balanced crawling performance

The trade-off is reduced axle clearance, which may cause the drivetrain to contact obstacles more easily in extreme terrain.

Portal Axles — More Clearance for Tough Terrain

Portal axles use additional gearing at the wheel hubs to raise the axle and differential housing higher from the ground.

Advantages:

• Increased ground clearance
• Reduced chance of getting hung up on rocks and obstacles
• Better performance in technical terrain

Portal axles are ideal for drivers who prioritize maximum clearance and challenging trail capability.

Choose Your Portal Axle Setup

Option 1 — Complete Portal Axle Assembly

The simplest way to add portal axle capability.

Best for:

Drivers who want improved clearance with minimal installation effort.

Option 2 — Portal Axles with Manual Differential Lock

A performance-focused setup for advanced crawling.

Best for:

Drivers who need adjustable traction control on technical terrain.

Option 3 — Portal Gear & Parts Kit

A hands-on upgrade for RC enthusiasts.

Best for:

Builders who enjoy customization and assembling their own upgrades.

Which One Should You Choose?

Choose solid axles if you prefer a scale-inspired appearance, lower center of gravity, and balanced crawling performance.

Choose portal axles if you want maximum ground clearance and better obstacle clearance for more extreme terrain.

With three portal axle options available, the FCX18 II F-100 lets you customize your crawler based on your driving style.