zipp service course sl 70 xplr handlebar beyond black, 44cm zipp zipp equips us to go further with the service course sl 70 xplr handlebar. its ergonomic shaping of a shallower drop combined with outsweep on the drops provides a stable platform for our most demanding and meandering rides, all in a lightweight package. the sl 70 xplr's sweet spot of a 5-degree flare with the 11-degree outsweep keeps the hoods more in line with your wrist angle, while the wider drop gives us more stability and confidence on rough terrain. made from lightweight and tough 7050 aluminum, the sl model is 45g lighter than the non-sl in a 42cm.