Industry Nine A318 Stem

Color: Blue
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Members get an estimated $15.50 (10%) back on this item.
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Crafted from domestically-sourced 7075 aluminum billet into a svelte design, the Industry Nine A318 mountain bike stem achieves a nexus of form and function for mountain biking.


  • Uses a 31.8 mm handlebar clamp diameter providing 180° of contact on the stem body for twist-free security that will play nice with both alloy and carbon bars
  • Stainless-steel hardware ensures everything stays in place and looks great, regardless of mud-blasting washes or rainforest climates
  • 40 mm stack height

Made in USA.

View all Industry Nine Bike Stems

Technical Specs

Best Use

Mountain Biking

Steer Tube Diameter (in)

1-1/8 inches

Bar Clamp Diameter

31.8 millimeters

Stem Rise

31.8 MM X 40 MM: +/-6 degrees

31.8 MM X 50 MM: +/-5 degrees


31.8 MM X 40 MM: 40 millimeters

31.8 MM X 50 MM: 50 millimeters


7075 aluminum


31.8 MM X 40 MM: 136 grams

31.8 MM X 50 MM: 155 grams

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