Gocycles produced until 2022 use DOT4. In 2022 we introduced mineral oil in order to improve environmental impact.
To know which type of oil your Gocycle uses, check your frame number and the brake levers of the bike.
All frame numbers including 923461
924697 until 924795
Frame numbers from 923462
Except the frame numbers from 924697 until 924795
The oil type is written on the brake lever as shown below.