Not sure on those, but a buddy bought some LA Chopper 18" apes for his Wide Glide and the bars we NOT knurled where you bolt them down. What a PIA trying to get them to not move back and forth. Think he finally pinned them.
According to the LA Choppers web page.....
Prime Apes are 39" wide
Twin Peaks are 34" wide
I seriously thought about the Prime Apes (for months),
just not sure about the fatigue associated with width.
Decided to go with the Twin Peaks and haven't looked back.
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