ZIP RD S-COURSE SILVER 70 ERGO 31.8x40 M-BK ALLOY B2A new variable radius drop, matching the carbon SL 70 Ergo, allows for multiple hand positions when riding in the drops The ergonomic flat top now has a 3 backsweep for wrist comfort A 10 ramp angle provides a perfect transition from bars to hoods, and sizes 40cm and up are clip on compatible The bar is also drilled to be Di2 RS910 junction compatible 70mm reach and 128mm drop for a short low position Crafted from ultra strong and lightweight 7050