Smart tool to check and adjust the amount of oil in your front fork. It is a common misconception that a fork leg must contain a certain amount of oil. This is very difficult to adjust correctly when changing the front fork oil, as there is easily a little extra hidden in the fork system if the fork has not been 100% disassembled and cleaned. Therefore, you instead measure the air gap down to the oil level (surface). This can be very troublesome as the spring and cartridge often take up a lot of space. The solution is this tool. You simply fill in too much oil. Adjust the tool to the correct distance and suck up the excess oil. Smart and accurate.