Chromag Stem Riza 31.8Mm Black"We've used our knowledge of making stems for almost 20 years to create a new, highest level, Canadian made bar grabber. There's no doubt the RIZA is our finest stem to date. CNC machined in Whistler, Canada from premium 6061 billet aluminum, it features our new faded edge on the clamp face to help avoid hot spots and stress risers when your bar flexes under load. Also it looks really flippin' nice. The RIZA comes in 31. 8 and 35mm clamps and 32, 38