I have a Whispbar Rail or FlushBar how do the sizes compare to the Yakima Flush or RailBar? Dave Updated January 30, 2020 15:39 Follow Use the attached PDF for determining the size conversion between Whispbar and Yakima Rail or Flush bars If you need additional help please contact our support team here, or by phone at 888-925-4621 during business hours Whispbar-Yakima bar conversion chart- with SKUs.pdf 800 KB Download Related articles Why can't I find any Whispbar fits? M-Measurements The CrossBars that Yakima recommended for my vehicle seem really long. Can I cut them down to length? CrossBar Options Rack is making noise Comments 0 comments Please sign in to leave a comment.