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Load image into Gallery viewer, Industry-Nine-Threadless-28.6-6-28.6-STEM2208-Bicycle-Stems
Load image into Gallery viewer, Industry Nine A318 Stem - 40mm, 31.8mm Clamp, +/-4.4, 1 1/8", Aluminum, Bronze
Load image into Gallery viewer, Industry Nine A318 Stem - 40mm, 31.8mm Clamp, +/-4.4, 1 1/8", Aluminum, Bronze

SKU: STEM2208

Industry Nine A318 Mountain Bike Stem 40mm, 31.8mm Clamp, Aluminum 7075, Bronze Finish, +4.4/-4.4 Degrees, CNC Machined, Twist-Free Security, Rainproof Stainless Steel Hardware, Performance-Driven CAD-Engineered Cycling Component

Regular price $155.00
$172.95 Sale price $155.00 Regular price
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Description
Specifications

Elevate your mountain biking experience with the Industry Nine A318 Stem - a premium component engineered for durability, precision, and style. Crafted from high-grade domestically-sourced 7075 aluminum billet, this 40mm handlebar stem seamlessly balances lightweight performance and rugged strength, making it ideal for aggressive trail riding and mountain adventures.

Materials & Construction:

Constructed from aerospace-grade 7075 Aluminum Billet, the Industry Nine A318 Stem offers exceptional strength-to-weight ratio, ensuring reliable performance on demanding terrains. Its bronze anodized finish not only provides a sleek, contemporary look but also enhances corrosion resistance, making it perfect for diverse riding conditions from muddy trails to humid rainforests.

Performance & Engineering:

Designed with a 6-degree angled rise (+4.4 and -4.4 options), the A318 stem allows riders to fine-tune their cockpit ergonomics for optimal comfort and control. Its precisely machined CNC construction showcases Industry Nine's advanced manufacturing techniques, resulting in a lightweight (136 grams) yet robust component that maintains stiffness and reduces flex under heavy trail loads.

Components & Technology:

Equipped with stainless steel hardware, this stem ensures a secure, twist-free connection with both alloy and carbon handlebars, thanks to its 31.8mm clamp diameter and 28.6mm S.H.I.S. interface. The ample 180-degree contact area on the stem body prevents slippage, providing riders with unwavering steering precision even in rugged terrain or muddy conditions.

Style & Use Case:

Available in a striking Bronze (Brown) finish, the Industry Nine A318 Stem adds a sophisticated touch to your mountain bike setup. Its versatile 40mm length and moderate rise make it suitable for trail riders seeking control, responsiveness, and a personalized cockpit angle. Whether you're tackling technical descents or climbing steep gradients, this stem offers the performance and style you demand.

Innovative Features:

Industry Nine's commitment to innovation shines through with this stem's crafted design emphasizing durability, security, and aesthetic appeal. The combination of advanced CNC machining and premium materials results in a component that stands out in both performance and visual style.

Upgrade your mountain bike with the Industry Nine A318 Stem - the perfect fusion of engineering excellence, high-quality materials, and trail-ready performance. Trust in Industry Nine's tradition of uncompromising components to elevate your riding experience.

  • Engineered from 7075 aluminum billet, the Industry Nine A318 Stem offers a lightweight yet durable construction designed for demanding mountain biking routes and aggressive trail riding.
  • Featuring a sleek bronze finish and a 40mm length with a +4.4 rise, this stem provides optimal cockpit positioning for balanced rider control and comfort across varied terrain.
  • Utilizing industry-leading CNC machining techniques, the A318 stem ensures precise fitment, robust strength, and twist-free security with an expansive 180-degree contact surface for both alloy and carbon handlebars.
  • Constructed with stainless steel hardware, this stem resists corrosion and maintains reliable clamping power even in muddy, rainy, or harsh environmental conditions, making it ideal for all-weather riding.
  • Designed for versatile use with a 31.8mm handlebar clamp diameter and a 28.6mm S.H.I.S. clamp diameter, the Industry Nine A318 Stem balances style and performance for mountain bikers seeking reliable, high-performance cockpit components.
Stem Angle (deg)6
Length40
Rise+4.4
Rise-4.4
MaterialAluminum
S.H.I.S. Stem Clamp Diameter28.6
Bar Clamp Diameter (mm)31.8
ColorBronze
Weight136
Defined ColorBrown
Stack Height40
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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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If you need to return your order please email us at info@365cycles.com, call us at 603-968-5797, or use the live chat on our site.

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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!

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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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Stronger together:

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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