Dent in steel seat tube. Intervention needed??

[al-onestare]

Remove paint, weld and grind/sand into submission.
It'll be fine.

Edit; Maybe even drill a hole in stress points and weld back.
Just don't drill nilly willy as that could make it worse.

Yeah, just cut out this section of the tube and weld a new part in. Sod it, chop the frame in half and weld in a carbon rear-end. Honestly

The Explosif tubeset, in this case Columbus Max, is super strong and wafer thin, even on the seat-tube. Someone will have the technical specifications. My point is, get expert advice from someone who really knows how to manipulate steel.

 

[al-onestare]

If you want to get the dent out I'd consider speaking to a local good (and I will emphasise that point) PDR guy. I've got a local one here I use from time to time who's excellent and loves all sorts of interesting challenges. A seat clamp on at the top to prevent distortion there and I reckon they'd get that out with very little time or effort.

This

 

[Thame Game]

I made one of these to take out a ding from my Roberts. Clamp the frame gently in the wood on a bench vice or whatever you have and gently wiggle it. The frame gets hot!
I virtually took out the whole dent. Miraculous!
Make sure you cut the hole dead straight and at the correct diameter of the tubing.