If you consistently push weight restrictions

2 diameter clamping surfaces

and GoPro Session Cameras

6mm Chainring bolts needed

8mm Hex: With hollow core that will accept loose hex keys to provide additional leverage

Hope AM-Freeride 35mm Bar Clamp Stem - Black - 35mm - 35mm x 0 Degree - 1 1-8th Inch Back in Stock If you consistently push weightThe Hope AM Freeride 35mm Bar Clamp Stem is CNC machined from a solid billet of 2014 T6 aluminium for strength and durability. The stem has more material taken out to save weight, a new front plate design, opposing steerer clamp bolts and a four bolt front handlebar clamp for more rigidity. Specifications: Weight from: 134g. Optimum machining to give the lightest weight without compromising stiffness. Available in: black, silver, red, blue, purple and