zipp service course sl 70 handlebar black, 42cm zipp the service course sl-70 is the bike fitter s go-to bar. the short reach to the hoods allows a proper fit without compromising stem length and steering control. with the revised ramp angle, proper fit is now achievable on even the most challenging setups.contoured top bar for natural ergonomic gripdrops angled out 4 degrees with 10 degree ramp anglealuminum 7050 constructioncompatible with clip-onsitem specificationsaccessory mount diameter31.8bar clamp diameter (mm)31.8bar drop (mm)128bar reach (mm)70bar top styleroundcable routinginternalclip-on compatibleyescolormatte blackdefined colorblackdrop bend stylecompactflare4materialaluminumweight250width measurementcenterwidth42