no the tubing is 1.25 OD and a shim is included that is on the bottom where the clamps go and its 1.125 OD with .028 wall. i cut it and bend it around the main tube so it fits snug and the clamps fit pretty tigh on it. if you dont want to use the shim you dont have to i just think its more dialed cause you dont have to tighten down the clamp as much
i just got my memory card for my cam so i will upload some pics of them installed...
heres pics
shows where the Stube is ovalized and how bars look
kinda shows the clamp area and how the Stube is ovalized at the top for strength
i donno why i took this...
you can see the shim there
thats a sample of the transparent black. when light hits it it shines all cool

also the paint on carys bars is smudged on the clamp area cause he HAD to go ride them before the paint dried. he was riding about 15mins. after paint. just impatient.
i also suck with computers and cant resize pics %-6 sorry.
<span class='smallblacktext'>[ Edited Tue Dec 20 2005, 10:57AM ]</span>