I already have Thule bars - can I buy a cheaper Cruz fitting kit? Unfortunately, you can't mix and match brands. Cruz roof bar fitting kits will not fit Thule roof bar feet. Related articles How do I know how far apart my roof bars are spaced? How do you fit Cruz FIX bars to cars with flush roof rails? Guide to roof bars: Different vehicle roof types Guide to roof bars: Steel or aluminium bars Guide to roof bars: Through or flush bars? Can't find what you're looking for? Get in touch