Genuine BMC replacement part. Includes 3 different main springs (Red: hard 21.5 Nm - Black: medium 16.5 Nm - White: soft 12Nm) and 3 different spacers to tune the SAG (Red: 6mm - Black: 3mm - White: 1mm). For details about configurations and setup advices, please refer to our "MTT suspension quick setup guide" available on our website.