Drop outs (derailleur hangers) are a sacrificial component of your bike, designed to bend or break in the event of an accident - saving your frame from being damaged. Always have a spare, as the bike is un-rideable without one. This hanger is compatible with the below models. Fits: Fit: Bike Model Type Year Heist X2 - X5 X7 2021 - 2022 Mount Bromo N7 -N8 2021 Siskiu (Full suspension) D6 2021-2024 Siskiu (Full suspension) D6 D7 2017 Siskiu (Full suspension) D7 2019 -2024 Siskiu Ebikes T6E,