The turn signals are designed for mounting directly on the bike. They have an E-number and are therefore approved for the road. However, when mounting casing turn signals is often the regulation of the viewing angle of the opposite side is not given. Also, the minimum horizontal distance of 24cm can not be guaranteed for all models. When converting to LED turn signals, it can happen that the flashing frequency is changed. However, this can be easily corrected with a load-independent relay, which is also available from us.