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. Choose from 11 striking anodized colorways to help your bike stand out from the crowd. A strong, stiff, high-quality mountain bike stemMade entirely in I9's Asheville, North Carolina facilityMachined from a billet of high-grade 7075 aluminumStrength tested well beyond industry standardsBurly stainless steel bolts match the strength of the stemChoose from 11 anodized colors and 3 different lengthsFits 31.8mm diameter handlebars onlyMaterial[stem] 7075 aluminum, [bolts] 316 stainless steelLength30, 40, 50mmRise[30mm] +/- 8-degree, [40mm] +/- 6-degree, [50mm] +/- 5-degreeClamp Diameter31.8mmSteer Tube Diameter1-1/8inStack40mmBar Attachment4-bolt aluminum faceplate with 180-degree wrapClaimed Weight[30mm] 4.5oz (127g), [40mm] 4.8oz (136g), [50mm] 5.5oz (155g)Manufacturer Warranty2 years