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Industry NineA318 Stem


Item # NIN1WU7

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  • Purple, 50mm ($145.00)
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Item # NIN1WU7

A318 Stem

Industry Nine has been making world-class cycling components in their Asheville, North Carolina machine shop for over a decade. Their A-series stems are crafted from a solid billet of high-grade 7075 aluminum, and are available in a variety of lengths well-suited to modern trail bike geometry. They're designed to be as strong and stiff as possible while maintaining a competitive weight, and they far exceed the ISO standard testing protocol for mountain bike stems, demonstrating I9's unwavering commitment to quality.

The A318 Stem is machined, anodized, and assembled entirely in-house at I9's Asheville, North Carolina manufacturing facility. The 7075 aluminum construction offers superior strength to the 6061 aluminum more commonly found on mountain bike stems, and the bolts are high-strength stainless steel to match the integrity of the stem. It's available in 11 anodized colors, and as the name implies, is designed to fit handlebars with a 31.8mm diameter.

  • A strong, stiff, high-quality mountain bike stem
  • Made entirely in I9's Asheville, North Carolina facility
  • Machined from a billet of high-grade 7075 aluminum
  • Strength tested well beyond industry standards
  • Burly stainless steel bolts match the strength of the stem
  • Choose from 11 anodized colors and 3 different lengths
  • Fits 31.8mm diameter handlebars only

Tech Specs
Material[stem] 7075 aluminum, [bolts] 316 stainless steel
Length30, 40, 50mm
Rise[30mm] +/- 8-degree, [40mm] +/- 6-degree, [50mm] +/- 5-degree
Clamp Diameter31.8mm
Steer Tube Diameter1-1/8in
Bar Attachment4-bolt aluminum faceplate with 180-degree wrap
Recommended Usedownhill, enduro, trail
Manufacturer Warranty2 years

Actual Weight

Purple, 50mm

Claimed Weight

Claimed weights are provided by the vendor.

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[30mm] 4.5oz (127g), [40mm] 4.8oz (136g), [50mm] 5.5oz
127g), [40mm] 4.8oz (136g), [50mm] 5.5oz (155g

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead

What do you think about this product?


>Rating: 5

excellent quality

I've used it several times
True to size

it might be slightly heavier than my stock stem but I love the fit and finish. the color (orange) looks great on my bike and it really makes the bike look nicer. it makes the bike mine. it feels really sturdy and solid on the ride.

>Rating: 5

Add some flash

I bought the blue one. It’s a stem. It’s flashy. It does the job. Quality craftsmanship. Get one!