XTR-SIL-R15V2B XTR 100% Pure Silicone Shock Oil 15 WT 200ml RONNEFALK Edition V2 Premium silicone shock oil made in Europe under laboratory conditions as used by David Ronnefalk to win the 2016 Worlds and Robert Battle to win the 2017 Euros! XTR tested under extreme circumstances to ensure maximum consistency from start to end of race. Supplied in bigger than normal 200ml bottles with flip close lid and easy identification