Adopts twin tubes for nitrogen gas and oil ■The interior of the suspension uses twin tubes containing nitrogen gas and oil. ■The oil dissipates mild shocks, while the gas withstands large shocks. ■The spring is a little harder than the original 5MP, but gives the impression that it is firmer. ■CNC duralumin is used for the upper and lower mounting parts. ■Stepless preload adjustment is possible. ■Special tools are included so adjustments can be made without damaging the main body. ■Accessories : 2 special tools (hex wrench/bar) Upper bolt diameter: 12mm Lower bolt diameter: 10mm Distance between bolt axes: Approx. 365mm Can be installed on Sero 225 (5MP/1KH/3RW/4JG). * Can also be installed on 4JG with separate tank (confirmed) * Spring color is red. (Black is out of stock) I had a Sero owner monitor it through a shop. (More than 500 km) We have been told that it is definitely at the same level as the stock one, but depending on the settings it can be even better. Assembling the parts should be done by someone with some level of knowledge. Note