The Yakima "Hold Up" secures the wheels. I would go for that over pressure on the top tube. I don't see how the stick-up folds down with the bikes mounted.
Correction: I see the tilt down now.
For the Stickup, there is a video here: https://www.youtube.com/watch?v=gPd3wLwmvVc
For the Holdup, there is a video here: https://www.youtube.com/watch?v=6P8dM7oE_34



Reply With Quote