Clockwork top tube dent advice needed!

JustLikeClockwork

Orange 🍊 Fan
Hello everyone, I was wondering if I could draw upon the collective knowledge of the group, and ask for a bit of advice?

I’m about to embark on my first proper retro build with my daughter (who’s rapidly getting interested in cycling/wrenching, and I get to spend some quality time with her… win-win!)

I’m wanting some advice on this 92/93 clockwork frame we’ve got hold of. The plan is to powder coat, in the original satin black. However the frame has a dent on the top tube (looks like a traditional bar end impact).

Firstly, it does look (and feel) like a sizeable dent. Is the frame a write-off? (Considering the actual value of the frame)

Secondly, if I was to get it powder coated, I’d obviously try to get the dent filled/repaired. I guess I couldn’t use conventional filler - is there a filler compatible with the power coat process (I assume it would have to be metallic in order to get the powder to adhere to the surface)

Hope I haven’t asked a load of obvious questions! I’ve never used the powder coating process before, so am a little nervous, and want to get it right.
 

Attachments

  • IMG_7083.webp
    IMG_7083.webp
    702.2 KB · Views: 23
  • IMG_7080.webp
    IMG_7080.webp
    124 KB · Views: 22
  • IMG_7078.webp
    IMG_7078.webp
    120.5 KB · Views: 21
  • IMG_7074.webp
    IMG_7074.webp
    113.2 KB · Views: 23
  • Like
Reactions: AGT
I've just done a Pine Mountain with a top tube dent look up frame blocks and tube repair on youtube. Made mine from hardwood to the tube dia clamp in vice and rotate back and fwd adding bit more compression each time. Be patient it worked for me minor skim of polyester filler used as I am wet painting mine.
 

Attachments

  • IMG20250415165157.webp
    IMG20250415165157.webp
    1.1 MB · Views: 23
  • IMG20250415113444.webp
    IMG20250415113444.webp
    549.4 KB · Views: 22
Frame blocks and filler would be a good learning experience, but I’d vote for not worrying about it: powdercoat is a bit thicker than paint so will fill it a bit, and unless your daughter is determined to have a pristine bike, a small characterful ding will be part of the story. (Or could be covered with a sticker, a plaster, etc ….)
 
Absolutely no effect on its strength. I spoke to a very knowledgeable frame builder (Dave Roberts) who categorically stated that dents like this in steel tubes are not a problem, cracks are, but not dents.
 
Absolutely no effect on its strength. I spoke to a very knowledgeable frame builder (Dave Roberts) who categorically stated that dents like this in steel tubes are not a problem, cracks are, but not dents.
Can't imagine a dent in a steel tube wouldn't in some way, however marginally, affect its structural integrity. But I certainly believe that rolling it out would do more harm than good.
 
To answer your filler question I believe it does have to be a certain type for powder coating. Best to speak to your powder coater as I'm sure they would be able to advise you. I have read of people using JB Weld as a filler prior to powder but best to ask the experts.
 
Back
Top