zipp service course sl 70 ergonomic handlebar black, 44cm zipp the sl-70 ergo s specially tuned drop shape creates comfortable hand positions with short reach to control levers vital for race situations.contoured top bar for natural ergonomic gripdrops angled out 4 degrees with 10 degree ramp anglealuminum 7050 construction38cm not compatible with clip-onsitem specificationsaccessory mount diameter31.8bar clamp diameter (mm)31.8bar drop (mm)128bar reach (mm)70bar top styleflatcable routingexternalclip-on compatiblenocolormatte blackdefined colorblackdrop bend stylecompactflare4materialaluminumweight260width measurementcenterwidth44