This is the last sort of thing you want to see on day 1 of a bike packing trip - a broken shock bolt. The bolt had snapped at the start of the threaded portion (which is typically the weakest part of any bolt) Luckily, a fix was at hand:
- we removed the non drive side linkage plate;
- backed out the remaining threaded portion of the shock bolt;
- refitted the linkage plate; and
- replaced the shock bolt with a top cap bolt.
Remainder of broken bolt
Top cap bolt used as shock bolt replacement
The top cap bolt was a little longer than the original shock bolt, but it enabled us to finish our bike packing trip without further incident.