Alternator Flat Mount is an adjustable dropout system designed to offer flawless functionality with flat-mount brakes installed. The dropout plates move back and forth on the frame, controlled with a captive barrel nut and screw for a minimal appearance. Compatible with frames designed for the Alternator Flat Mount standard Accommodates a 12 mm thru-axle Allows the rear axle to be adjusted through a 15 mm range Note: This part number only includes a single Alternator Flat Mount plate Hardware kits (sold separately) must always be paired with the style of dropout plates being installed on the frame