The CX-50 had crazy wind noises with ANY roof rack/bars and they said installing these under the first bar helps: VA54-V3-84E - Aero Kit Crossbars Mazda Parts Connect
See photo 1.
Another solution replace the Thule strips with Rhino Vortex strips but the CX-50 members said it fits oem but I am not sure of Thule: https://www.etrailer.com/Accessories-and-Parts/Rhino-Rack/RRM626.html
See photo 2.
Lastly I can buy a wind deflector for about $106.
See photo 1.
Another solution replace the Thule strips with Rhino Vortex strips but the CX-50 members said it fits oem but I am not sure of Thule: https://www.etrailer.com/Accessories-and-Parts/Rhino-Rack/RRM626.html
See photo 2.
Lastly I can buy a wind deflector for about $106.
