The SL145 stem is a perfect example of the determination Zipp engineers display when faced with a challenge. It 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 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. Material Carbon Clamp Diameter 31.8g Angle ±6deg Weight 135g

The SL145 stem is a perfect example of the determination Zipp engineers display when faced with a challenge. It 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 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. Material Carbon Clamp Diameter 31.8g Angle ±6deg Weight 135g

The SL145 stem is a perfect example of the determination Zipp engineers display when faced with a challenge. It 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 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. Material Carbon Clamp Diameter 31.8g Angle ±6deg Weight 135g

Fashioned from a mere 102 grams (100mm length) of carbon and titanium, the SLSpeed proves that a superlight stem doesn't have to compromise on stiffness, strength, or reliability. To make the most of every gram, the SLSpeed's unidirectional carbon body contains no embedded metal. Rearward-facing bolts thread directly into the faceplate to minimize weight, while the bottom edge of the clamp is design to contact the body of the stem in order to Reduce flexing. A self-aligning washers at the steerer clamp mean that the bolt stays straight as it's tightened, Reducing long-term stress on the system. Material Carbon Clamp Diameter 31.8g Angle ±6deg Weight 102g

Fashioned from a mere 102 grams (100mm length) of carbon and titanium, the SLSpeed proves that a superlight stem doesn't have to compromise on stiffness, strength, or reliability. To make the most of every gram, the SLSpeed's unidirectional carbon body contains no embedded metal. Rearward-facing bolts thread directly into the faceplate to minimize weight, while the bottom edge of the clamp is design to contact the body of the stem in order to Reduce flexing. A self-aligning washers at the steerer clamp mean that the bolt stays straight as it's tightened, Reducing long-term stress on the system. Material Carbon Clamp Diameter 31.8g Angle ±6deg Weight 102g

Fashioned from a mere 102 grams (100mm length) of carbon and titanium, the SLSpeed proves that a superlight stem doesn't have to compromise on stiffness, strength, or reliability. To make the most of every gram, the SLSpeed's unidirectional carbon body contains no embedded metal. Rearward-facing bolts thread directly into the faceplate to minimize weight, while the bottom edge of the clamp is design to contact the body of the stem in order to Reduce flexing. A self-aligning washers at the steerer clamp mean that the bolt stays straight as it's tightened, Reducing long-term stress on the system. Material Carbon Clamp Diameter 31.8g Angle ±6deg Weight 102g