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Load image into Gallery viewer, Zipp-Threadless-28.6-17-Degrees-1-1-8-in-STEM0518-Bicycle-Stems
Load image into Gallery viewer, Zipp Service Course SL Stem 130mm 31.8mm +/-17 1 1/8 in Matte Blk B2 Aluminum
Load image into Gallery viewer, Zipp Service Course SL Stem 130mm 31.8mm +/-17 1 1/8 in Matte Blk B2 Aluminum
Load image into Gallery viewer, Zipp Service Course SL Stem 130mm 31.8mm +/-17 1 1/8 in Matte Blk B2 Aluminum

SKU: STEM0518

Zipp Service Course SL Stem 130mm 31.8mm +/-17 CNC Machined Aluminum Lightweight Bike Stem with Titanium Hardware, Matte Black, for Road and Cyclocross Performance, No-Flex Sprint & Acceleration Optimization

Regular price $105.56
$130.00 Sale price $105.56 Regular price
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Description
Specifications

Elevate your cycling performance with the Zipp Service Course SL Stem 130mm - a precision-engineered component designed for serious cyclists and competitive riders. Crafted from high-grade 7075 aluminum, this lightweight yet remarkably strong stem offers superior stiffness (1.85 N m/mm) for maximum power transfer, ensuring no flex during sprints or aggressive acceleration. Its aerodynamic shape not only enhances bike handling but also contributes to a sleek, professional look that complements any high-performance road or mountain bike.

Constructed with precision-machined and relieved faceplates, the Zipp Service Course SL Stem reduces weight without compromising durability. The titanium hardware with TORX head bolts allows for accurate torque settings, providing peace of mind and ease of adjustment during assembly or maintenance. The 130mm length, combined with a +/-17 angle, offers versatile cockpit positioning to optimize rider comfort and control across various terrains and riding styles.

Designed for compatibility with 31.8mm handlebar diameters and compatible with SHIS standards (28.6mm clamp diameter), this matte black aluminum stem effortlessly integrates into your bike's cockpit for a clean, professional finish. Whether you're racing, riding gravel, or hitting the trails, the Zipp Service Course SL Stem delivers unmatched performance, durability, and style.

Key Features & Benefits:

- Premium Materials: Forged AL-7075 aluminum for lightweight strength and longevity

- Performance & Engineering: Optimized stiffness (1.85 N m/mm) for precise handling and power transfer

- Components & Technology: Machined, relieved faceplate with titanium hardware and TORX bolts for durability and easy torque adjustment

- Style & Use Case: Sleek matte black finish, ideal for competitive road cycling, gravel riding, and mountain biking

- Innovative Features: Precise engineering with multiple angle options (+17 , -17 ) for customizable cockpit setup

Upgrade your bike with the Zipp Service Course SL Stem and experience the perfect balance of durability, performance, and style. Its innovative engineering and high-quality materials make it a top choice for cyclists seeking reliability and competitive edge.

  • Lightweight 7075 aluminum construction ensures optimal strength-to-weight ratio, reducing bike weight while maintaining durability for aggressive riding and long-distance expeditions.
  • Designed with a +17/-17 degree adjustable angle, offering versatile cockpit positioning for enhanced aerodynamics, comfort, and control on varied terrains.
  • Engineered with machined, relieved faceplate and titanium hardware with TORX heads for precise torque application, ease of adjustment, and improved aesthetic appeal.
  • Optimized for 31.8mm handlebar compatibility, making it suitable for a wide range of road, gravel, and cyclocross bikes, while delivering reliable performance in all riding conditions.
  • Stylish matte black finish and sleek, forged aluminum design provide a professional look combined with high-performance features, ideal for competitive cyclists and serious enthusiasts alike.
Stem Angle (deg)+17
Stem Angle (deg)-17
Length130
Bar Clamp Diameter (mm)31.8
ColorMatte Black
Weight125
MaterialAluminum
Defined ColorBlack
Stack Height41
S.H.I.S. Stem Clamp Diameter28.6
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We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

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Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

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365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds!

If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


Company Core Values: 

These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

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If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

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Customer Reviews

Based on 3 reviews
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Nonplussed

Happy customer. Needed this very specific stem in Singapore. No bike store had it. Amazon.sg and ZIPP worked perfectly to export it from the US and get it to me in perfect condition in good time.;

T
TS

need a 100mm -17 degree stem not able to get it correct size with Tarmac SL7 proprietary stem. matt finished an update from last gen

T
TS

need a 100mm -17 degree stem not able to get it correct size with Tarmac SL7 proprietary stem. matt finished an update from last gen;