This is the JKS Flex Performance Spring Kit available for the Flex Connect Links. These are three sets of springs, each spring set has their own setting.
• RED: Preferred for the road, 45% softer than factory, with 1/3 total link travel.
• Yellow: Preferred for the trail, 60% softer than factory, with 1/6 total link travel.
• Blue: Preferred for rocks, 75% softer than factory, with 2/3 total link travel