Thought I’d share this video of how I have my Zooka Tube Rod Holder mounted to my bike. I have the TOPEAK Explorer bike rack and I attached the 1.5″ YakAttack ScrewBall. The ScrewBall comes with a “T-Bolt” that simple aligns in the “V” created by the arms on the bike rack. I also used a small piece of cut-up neoprene to prevent the “T-bolt” from cracking the finish. Be sure to mount it on the left side of the bike. If you mount it on the right side it will come loose and fall off the bike.