I have a full size bike I occasionally fly with that has S&S couplers. Fits right on the flighdeck behind the seat in a special case. Granted this is one of the largest narrowbody offices and not a CRJ, but it works no problem. I only take it if it’s one leg out and one leg back. This is either a 2 leg 2 day or leaving it in the bag room and snagging it/dropping it off. This is a full size road bike and I only take it if the ride is worth it. This was a hilly ride outside Berkeley on this nice couch I found. Don’t let others deter you from making the most of an overnight outside of a bar. As a general rule, I ensure whatever it is (this bike) is only an inconvenience to me and not the crew, or anyone else for that matter.