All,

So, I noticed a small crack on the seat tube of my 2006 Dahon Mariner. The bike is more than 5 years old and therefore out of warranty.

Just after taking these photos, I've marked the length of the crack with a Sharpie, so that I can determine if the crack is growing. I have never ever ridden with the seatpost extended past its limit markings (in fact, I normally keep the seat post about half an inch lower than its limit), never hopped a curb, and I ride on a sprung Brooks Flyer (which I thought would absorb any excess stress.)

The following photos are taken with and without flash.





Any thoughts on a course of action? Repairs possible?



Thanks,
Warr