Race Tech FRSPS4430130 Fork Spring kg/mm - 1.30 43.5x300mm

The Race Tech FRSPS4430130 is a high-performance motorcycle fork spring with a 1.30 kg/mm (72.8 lb/in) spring rate and dimensions of 43.5mm outer diameter × 300mm length. Selecting the correct spring rate is the critical first step to achieving balanced, predictable handling — and this spring delivers precisely engineered performance to match your riding style and weight.

Key Features:

• Spring Rate: 1.30 kg/mm (12.74 N/mm / 72.8 lb/in) — accurate to within 2%
• Dimensions: 43.5mm outer diameter × 300mm length
• Material: Chrome silicon steel for a high stiffness-to-mass ratio
• Shot-peened and heat-treated for long-term durability and fatigue resistance
• Preset construction — will not sack out over time
• Lightweight design — highest stiffness-to-mass ratio in the industry
• Sold as a set (pair)

Race Tech fork springs are a direct upgrade over stock springs, which are typically under-sprung for average to heavier riders and lead to unbalanced, unpredictable suspension behavior. With over 500 spring rate options in the Race Tech lineup, riders can dial in exactly the right rate for their size, riding ability, and discipline — from street and sport to dirt and off-road.