I cut three oval holes (2 downtube, 1 seattube) for the salsa grommets (or something similar) in an early steel 2000s Jamis Dragon when I was repainting it a few years ago. I have been using it as a gravelish/bikepacking bike, and have around 1000 miles on it, no problems, no warranty, no worries. If it was a brand new rig I may have had second thoughts, but... I think rust is a bigger threat! And I'm not worried about that either.
Awesome. I've been putting off drilling a hole somewhere on the downtube, near the headtube on my Romanceur to route a rear dynamo light cable into for a few years. Maybe through the downtube shifter boss? Anyone I've asked has warned against it fearing stress risers but no one has given first hand experience of it failing. I think I'll give voiding my warranty a try as well.
I did this on a mtb frame build last year. The front triangle tubes were undersized and the cable port wasn’t reinforced. It split all the way round the down tube in under 6 months. Should be less of a problem at the base of a seat tube like Adam’s done in the video as long as you avoid thin butted sections but I recommend reinforcing holes on down or top tubes. Silver soldering a washer round it should suffice
The seat tube near the bottom bracket is not a super high stress zine but even a reinforced hole in a down tube is sketchy, that will almost certainly break IMO!
@@sklarbikes My current build has a reinforced port in the same place, although the tube is much less flexy, so I'll have to get back to you about any breakage 🤣
Jagwire makes a round grommet that has an angled hole entry. It’s also a smaller 8mm hole IIRC.
@@GHinWI that would be sweet!
Such a chill vibe.
😂 i need a dropper post on everything! ❤ great video tutorial.
I cut three oval holes (2 downtube, 1 seattube) for the salsa grommets (or something similar) in an early steel 2000s Jamis Dragon when I was repainting it a few years ago. I have been using it as a gravelish/bikepacking bike, and have around 1000 miles on it, no problems, no warranty, no worries. If it was a brand new rig I may have had second thoughts, but... I think rust is a bigger threat! And I'm not worried about that either.
Nice video. I ran a dropper cable through the lower bottle cage hole on seat tube. Easy peasy.
dope vid. ty for repping
That's a big hole!
Awesome. I've been putting off drilling a hole somewhere on the downtube, near the headtube on my Romanceur to route a rear dynamo light cable into for a few years. Maybe through the downtube shifter boss? Anyone I've asked has warned against it fearing stress risers but no one has given first hand experience of it failing. I think I'll give voiding my warranty a try as well.
I did this on a mtb frame build last year. The front triangle tubes were undersized and the cable port wasn’t reinforced. It split all the way round the down tube in under 6 months. Should be less of a problem at the base of a seat tube like Adam’s done in the video as long as you avoid thin butted sections but I recommend reinforcing holes on down or top tubes. Silver soldering a washer round it should suffice
The seat tube near the bottom bracket is not a super high stress zine but even a reinforced hole in a down tube is sketchy, that will almost certainly break IMO!
@@sklarbikes My current build has a reinforced port in the same place, although the tube is much less flexy, so I'll have to get back to you about any breakage 🤣
Do you think there is less stress on the side of the downtube as opposed to the front or back?
Definitely!
Interesting! I didn't know that. Thanks!
You are one of the most underappreciated creators on YT. Layers within layers...
Ha, thanks!
Holy shit I need to go do this to my Crux!