Originally Posted by
repechage
There is a reason why I always clamped the seat stays at the brake bridge when spreading a frame from 120 to 126mm.
Yes, the seat stays do need to bend slightly when spreading a frame.
The Waterford way mentioned where they replace the bridge is interesting but it just transfers the stress up to the top.
Hmmm.
If the frame was out in an unheated space during the Polar Vortex freeze.... That could be a contributing factor.
Amtrak stopped running in/out of Chicago for a reason during the worst of it.
Very cold metal gets very brittle.
I had a recently cold-set frame out in my detached garage during this past week's extreme cold weather. This thread is scaring me. I will definitely give it a careful inspection.
I'm also concerned that my Wahoo sensor batteries may be dead, but maybe not.
It's an interesting point to consider in a place like Chicago... If you live in a place that can see extreme temperatures, do you bring your vintage bikes in from a garage to a more mild indoor climate? I never have, unless I was working on them in my basement.