*The 40mm carrier is only to be used on a keyed style axle!! If you need a 40mm carrier for a non-keyed style axle, you can special order this item through us by calling or emailing. 

6061-T6 billet aluminum (87mm outside diameter) housing, chrome-moly center tube, bearings, dust seals, zinc plated grease zerk, zinc plated steel spanner, 6061-T6 aluminum caliper mounting plate, 6061-T6 billet aluminum caliper spacers, zinc plated steel brake plate retainer.