Alternator 2.0 is the latest iteration of Salsa’s adjustable dropout system.
5 They are specifically designed for, and only compatible with, Salsa frames using the 2.0 Dropout plates are compatible with frames featuring 142, 148, 177, or 197mm spacing Hardware kits (sold separately) must always be paired with the style of dropout plates being installed on the frame Allows for the rear axle location to be adjusted through a ~17mm range relative to the bottom bracket axle Note: This part number only includes a single Alternator 2.