R5 Dura-Ace Di2 Size:54 Zipp’s ABLC™ Sawtooth™ Technology uses

Zipp’s ABLC™ Sawtooth™ Technology uses an intricate dimpling pattern to improve aero efficiency

square taper Crankset Prowheel

It does this through a reinforced chainring on its unique asymmetrical four-arm spider construction

while preserving the integrity of the carbon steerer on your high-end fork with FSA's Headset Compression Plug

FEATURES: Designed for 5-arm standard

R5 Dura-Ace Di2 Size:54 Zipp’s ABLC™ Sawtooth™ Technology usesR5 has one jobget to the top, fast. But for all the glory and fanfare that comes with a summit finish, theyre rarely the only climb of the day. And while a race isnt usually won on a descent, they can certainly be lost. A climbing bike that can't carve a hairpin is a bit like a cup of decaf coffee. This is the fourth iteration of the R5, and while weight and stiffness have varied over the years, the handling, poise, and unmatched prowess on a descent