Old 03-08-21, 04:22 PM
Senior Member
Alcanbrad's Avatar
Join Date: Apr 2015
Location: New Jersey
Posts: 356

Bikes: '14 CoMo Carrera, '11 CoMo Primera co-pilot, '98 Santana Visa, a Plethora of road bikes, A commuter/Gravel beast (and 1 MTB)

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
Liked 30 Times in 26 Posts
It's hard to see much detail as the pictures are very small, but given the symmetric failure points right where the body of the adapter changes radius makes me wonder if there is a stress concentration situation going on. Is there evidence of cracking at the 4 and 10 oclock position of the second picture? Additionally, if the donut is aluminum there may be some galvanic corrosion coupled with a stress concentration that could weaken the metal.

Can you post larger pictures?
Alcanbrad is offline