Yes! 

The measurements for  R1T and R1S cross bars are roughly 3.6" tall by 1.4"

The Rev Roof Top Tent comes complete with hardware to mount to cross bars up to 4"/ 10cm and no taller than 1.5" / 4 cm 

The cross bars should be positioned no closer than 24"  / 61 cm , and no wider than 40" / 102 cm. The recommended distance between the bars is 32" / 82cm

For more detailed info:  Read this article! 

https://c6outdoor.com/blogs/news/starter-guide-to-vehicle-roof-top-camping-in-a-rev-tent