Industry Nine Mountain Stem- A318A318 Stem HANDLEBAR CLAMP DIAMETER 31. 8mm 30mm 40mm 50mm Industry Nines A Series mountain bike stems are crafted from domestically sourced 7075 aluminum billet into a svelte design achieving a nexus of form and function. Using advanced manufacturing techniques honed over decades in our CNC machine shop, we continue our proud tradition of offering riders uncompromising components. Taking name and shape from the A axis in our five axis machining
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