Landing pad 11 and control towers. 58" bars. Do not over tighten the screw that holds the LP11 into place. Leave it loose. Place the control towers in the LP11 on both sides. Remove towers and tighten the LP11 down. This will prevent funky angles and poor fitment.
Edit if you want spiffy look into Yakima's WispBar setups. More aero more cool same load rating.