This sleek yet sturdy attachment has impact-resistant board supports, an integrated mast carrier, belt eyelets and integrated tensioning straps to securely hold your board while you drive. (Requires base support, as shown) BMW Base Support System required. 89.8" x 32" x 12.2" ( L x W x H) Unladen Weight: 60 lbs. (approximately) Capacity: 15.9 cu.ft. (approximately). Vehicle must be equipped with roof rails, contact your center for more information.