Originally Posted by
bandregg
I ride Dade Pista handlebars which is listed as 31.7 on an FSA OS-115 stem which is listed as 31.8. I race this and with properm torque haven't had any movement at all.
This. Similar setup for me. 31.7 bars in a 31.8 stem. After five years there has been no movement, no problems. I undo the mounting bolts to re-grease every year and have never found any type of unusual marks or damage on the bar clamping area.