Race Face Atlas FR Direct Mount Stem Specifications: Sculpted gravity stem with full TI hardware Machined 6061 aluminium, 4 bolt U-shaped clamp with Ti bolts Flippable design allows for perfect height set up Built for DH Racing/FR Bar diameter 31.8mm Weight 162g Mount: Boxxer Stack 24 or 8.5mm (reversible) Buy Race Face Atlas FR Direct Mount Stem from Chain Reaction Cycles, the World’s Largest Online Bike Store.