Fox Factory Fork Cartridge Lowering Kit For Harley Touring The FOX Fork Cartridge Lowering Kit lowers your bike 1 and uses linear rate springs that maintain the same support throughout the fork's travel and won't dive when you brake or wallow when you corner. The cartridge's opposed-piston design creates a sealed system to prevent air from mixing into the oil, resulting in consistent damping control no matter how long you ride. The cartridge's spring-loaded upper piston moves easily to absorb even the smallest bumps, unlike gas-charged designs that can create internal friction and a harsh ride. Features: Lower's forks 1 Model-specific ride tune Works with existing forks to maintain original look Speed-sensitive closed cartridge damping control Tuned for improved rider comfort and cornering control Linear spring rates support the fork with consistent force, reducing brake dive Fully rebuildable and re-valvable