26.0 to 31.8 mm Handlebar Shim
thingiverse
A 26.0 to 31.8 mm shim. I have a few bikes, & one Cygolite front light. One of my bikes has a 26.0 mm handlebar, so I have to tighten down the front light clamp a lot to swap it between this particular bike & my others. This is 19 mm in width, which is just about the width of the Cygolite front mount. May be too narrow/wide for your accessories, but you could just edit the SLDPRT file pretty easily. Updates 17 Jan 17: Printed & mounted today. Fit was good, & I used electrical tape to secure the halves together. My Cygolite front light mounted on this well, but I recommend putting some inner tube onto the handlebar first; over bumps, the whole thing rotated forward because although there's friction between the light mount & the shim, there isn't any between the shim & the handlebar.
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