Ergonomic innovation is probably more critical to the higher standard of the new 10-speed S.T.I. levers than the added gearing. The narrower cradle-style perch welcomes the high-on-the-hood riding style and accommodates all sizes of hands. The shift internals borrow the robustness from our MTB technology which results in a smooth and effortless shift.

Ergonomic design: Refined lever hood for improved ergonomics.
Robust internal mechanism.
Same lever response as Dura-Ace.
Ergonomic shift stroke movment.
Effortless shifting: Shift effort is reduced on release lever.
Short stroke shifting:Inward shift stroke distance is reduced by 10mm.
490 grams