Update. It's gggGary's fault, asking how these are holding up.
It's been 7-8 years since I used PEX conical washers on my footpegs. The footpegs have been fine, still firm, no flopsy-mopsy, not much vibration. But, the rubber is getting a bit tattered.
I have some new flat and cone washers for replacement.
I like to sandwich the footpeg bracket holes with larger 1-1/16" OD reinforced flat washers, to reduce the amount of "floppy" in the pegs. Assembled, with new flat and cone washers, looks like this.
But, this time I have some MikesXS rubber bushings that I bought 3 years ago, and want to try them, with a bit of a twist. Add some 3/4" ID, 15/16" OD o-rings to the ends, to sandwich the footpeg mount holes, and reduce that flopping.
Now, looks like this, o-rings barely visible, much cleaner.
We'll see how well these hold up. I'm thinking that by reducing the footpeg slop, the MikesXS rubbers may stand a chance at a longer life...