Moose Racing 0405-1171 Front Fork Spring Set 43.5mm 4.8 N/mm

The Moose Racing 0405-1171 is a front fork spring set designed for off-road motorcycles equipped with 43.5mm diameter forks. With a spring rate of 4.8 N/mm and an overall length of 455mm, these springs allow riders to fine-tune suspension performance to match their weight and riding style.

Moose Racing partners with NOK to produce these fork springs using highest-grade chrome silicone wire. Each spring is cold-coiled and then heat-treated for consistent performance and long service life. Springs are pre-set and ground to length before being polished to reduce friction for smoother suspension action.

Key Features:

• Spring rate: 4.8 N/mm
• Fork tube diameter: 43.5mm
• Spring length: 455mm (approximately 17.9 inches)
• Manufactured to DIN2095 Grade 1 standards
• Multi-stage production: cold-coiled, heat-treated, tempered, shot-peened, ground ends, and polished
• Spring rate laser-etched on the end of each spring for easy identification
• Part number etched directly into the end of each spring
• Chrome silicone wire construction for durability and consistent spring rate

Upgrading to properly rated fork springs is one of the most effective suspension improvements available for dirt bikes and off-road motorcycles. Matching the spring rate to rider weight ensures correct sag settings, improved handling, and reduced bottoming under hard riding conditions.