- Spring rate 9.5 N/mm - Inner diameter: 25.5mm - Length: 300mm length This Öhlins spring set will fit the NIX 30 Street front fork cartridge kit for upside down forks. These cartridge kits are sold with 9.5, 10 and 11N/mm spring sets only, so you can choose the best spring rate for your specific application (rider weight, preferences). Optional lighter spring sets are available as shown. Please follow Öhlins recommendations regarding spring rates and oil in relation to rider's weight and preference as listed in the specific cartridge kit installation instruction. Available spring sets: - 962747 spring set 8.0 N/mm - 962748 spring set 8.5 N/mm - 962749 spring set 9.0 N/mm - 962750 spring set 9.5 N/mm - 962738 spring set 10.0 N/mm