What bike attachment do I need?

[gotchiguy]

I've got the official Renault roof rack and I was just wondering what attachments I should look for on eBay to fit my bike to it as that's why I bought it. Thanks!

 

[jamesw]

I've got the Thule 951 racks on my car and can't fault them. I've got all manner of bikes, different shapes and sizes and work great. Not the cheapest but you will struggle to get something better

 

[gotchiguy]

Watching ebay for these and one close to me has come up at a good price. He is offering to stick in either a "t track" or "square bar" attachment. Presumably I need the former for our style bars?