Can I still use my Round Bars with your new towers? Raul Bonifacio Updated October 24, 2017 22:17 Follow Absolutely. You will need to purchase the Round Bar Adapter, part number 8003536, these run $30 for a set of 4. Related articles CrossBar Options If I purchase round bars will they come with end caps? The CrossBars that Yakima recommended for my vehicle seem really long. Can I cut them down to length? Rusted Crossbars CoreBar Bar Dimension? Comments 0 comments Article is closed for comments.