The Zipp SL145 stem is a perfect example of the determination that Zipp's engineers display when faced with a challenge. The stem requires 50 sections of hand-wrapped carbon cloth, titanium bolts sourced from the same Italian producer used by Ducati''s MotoGP racing program, and a stainless steel insert within the anodized black faceplate.
The Zipp SL145 was not easy to design and it''s not easy to produce. But the result is the stiffest, strongest all-carbon stem available - as verified by EFBe Laboratory. The SL145 stem is a rock-solid connection from bars to bike that weighs just 135g (@100mm).