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 you fit Cruz FIX bars to cars with flush roof rails? Guide to roof bars: Different vehicle roof types How do I know how far apart my roof bars are spaced? Guide to roof bars: Through or flush bars? Guide to roof bars: Steel or aluminium bars Can't find what you're looking for? Get in touch