Product Description This derailleur hanger is an original spare part for Chromag Boost frames with 12 x 148 mm over locknut dimensions (2017 or newer models). Compatibility:Chromag boost frame (12 x 148 mm), 2017 or newer modelsManufacturer Number:145-003-01 Contents:1 x Chromag Boost derailleur hanger Manufacturer: Chromag Bikes 1121 Industrial Way Squamish BC V8B 0H1 Canada info@chromagbikes.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de