System Alloy FX/FW Hub with Cog

Product Overview

The System Alloy FX/FW Hub with Cog is a versatile rear hub designed for fixed-gear and freewheel riding configurations. The sealed bearing construction with alloy body delivers durability and smooth rotation. The flip design allows quick conversion between freewheel (FW) and fixed (FX) modes using the included 17T cog.

Key Features

• Sealed bearing construction – Precision sealed bearings resist dirt and water intrusion, extending service life and reducing maintenance. Cartridge design provides smooth rotation and reliable performance across varied conditions.

• Alloy body – Lightweight aluminum construction reduces rotational mass while maintaining structural integrity. Durable alloy resists corrosion and maintains finish through extended use.

• Flip freewheel to fixie design – Reversible hub design allows quick conversion between freewheel mode (coasting) and fixed mode (fixed gear) without hub replacement. Flip the wheel around to change modes, ideal for training versatility or experimenting with different riding styles.

• 135mm width with 10mm axle – Standard spacing accommodates most BMX and modern bike frames with 10mm front or rear compatibility. Verify frame dropout spacing for proper fit.

• 17T cog included – Single-speed cog provides appropriate gearing for fixed-gear applications. 17T balances acceleration with top-end speed for general-purpose fixed-gear riding.

• Versatile riding options – Freewheel mode suits coasting and casual riding; fixed mode suits track, training, and fixed-gear trick applications. Single hub accommodates both disciplines.

Technical Specifications

• Hub type: Flip freewheel/fixie dual-mode
• Material: Alloy body
• Bearings: Sealed cartridge
• Hub width: 135mm
• Axle: 10mm
• Cog included: 17T
• Modes: Freewheel (FW) and Fixed (FX)
• Cog configuration: Removable and interchangeable

Compatibility and Ideal Use Cases

Compatible with:

• BMX and bike frames with 135mm rear hub spacing and 10mm axle compatibility
• Standard 1/8" chain systems
• Flip-compatible wheel builds with dual-mode capability
• Fixed-gear and freewheel drivetrain configurations

Ideal for:

• Riders experimenting with fixed-gear and freewheel riding
• Training setups requiring freewheel and fixed-gear versatility
• Fixed-gear trick and track riding
• Casual and competitive riding across different disciplines
• Single-wheel builds accommodating multiple riding modes