The santa cruz chameleon 70 dropouts are designed to fit the 2017 chameleon only providing the spacing for different wheel sizes amp speed set ups dropouts are available for both 275 amp 29er sized wheels with options for single speed 142mm axle or geared 148mm axle santa cruz chameleon 7 dropouts features compatible with chameleon 7 2017 275 or 29er single speed or geared 142mm or 148mm