Ibis Alloy 31. 8mm Stem Solid Up Front, No Fuss Riders who want a clean, reliable stem to match their Ibis build without overthinking it have there answer right here. The alloy BFD stem pairs with standard 31. 8mm bars on mountain and gravel setups, and the reversible rise gives you a quick way to adjust bar height without swapping parts. It ships on Ibis bikes for a reason: it fits the build, holds the bar, and gets out of the way. Features31. 8mm handlebar clamp fits standard MTB and gravel bars; pair with Ibis Blackbird stems if you run 35mm bars28. 6mm (1-1/8"") steerer clamp fits the vast majority of modern mountain and gravel forks Reversible +7deg / -7deg rise flip the stem to raise or lower bar height without changing parts Alloy construction durable, no-nonsense build suited to trail and all-mountain use Multiple length options available in 40, 50, 70, 80, 90, and 100mm to dial reach on any geometry Specifications Handlebar Clamp Diameter31. 8mm Steerer Clamp Diameter28. 6mm (1-1/8")Length40, 50, 70, 80, 90, 100mm Rise / Angle+7deg / -7deg (reversible)Clamp Width Stack Height Material Alloy Weight Intended Use Trail, All-Mountain, Gravel | Ibis Bicycles | Bfd Alloy 31. 8Mm Stem - Oe Packaged 40Mm, 3deg | Aluminum