Is this a safe way to add water bottle mounts?
08-08-22, 11:02 AM
#26
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My two TiCycles ti frames have three sets each of bottle mount rivnuts. 2008 and 2011. Haven't had a single issue and the bottom, under the DT cage goes on and off for hot and long rides. The Dremel hasn't seen either bike. (I have heard framebuilders say that drilling WB holes is one of the more challenging fits because error is so obvious. I'm guessing most make jigs early on just for this.)
If I had to do this to a frame, I'd add a bit of epoxy to help reinforce the mechanical clamping of the rivnut and its serrations. Cheap insurance.
-Kurt
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08-08-22, 11:03 AM
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It's really simple. You are supposed to be drinking at the bar or riding your bike, but not both at the same time. (Says he who hasn't had a HB mount cage in a very long time. Not since my pump came off the DT.)
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08-08-22, 11:14 AM
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I meant in regards to anyone doing it RJ style - home-brewed. However, I have heard of some cases of loose, factory-installed rivnuts, and - come to think of it - my Birdy BD-1 was one of them. It had a rivnut for a chain keeper that had been ripped off, causing the rivnut to spin around in the frame.
If I had to do this to a frame, I'd add a bit of epoxy to help reinforce the mechanical clamping of the rivnut and its serrations. Cheap insurance.
-Kurt
If I had to do this to a frame, I'd add a bit of epoxy to help reinforce the mechanical clamping of the rivnut and its serrations. Cheap insurance.
-Kurt
08-08-22, 11:17 AM
#29
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You know. with care, I bet virtually all loose rivnuts could be epoxied and used a long time. Getting the area clean would be a challenge. I'd start a screw after epoxying and also set a thin layer of the mixed epoxy aside so I could seen when it is almost set up hard, then back the screw out at that time. (Prepping the screw threads with wax or soap would be smart.) I would go with JB Weld or Marine Tex. Maybe pretty up the job with a little liquid boat building epoxy and an artist's brush after. (Used to build boats. For some kids it's the sand box. For me it's the gooey stuff.)
I dare say the diameter probably matters less than the completeness of the crush between the tubes. That's probably why some of them fail too; the rivet may only crush against the lower crown/curvature of the tube.
-Kurt
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08-08-22, 11:37 AM
#31
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There are certainly plenty of bikes I wouldn't drill, but I did add rivnuts to my Grand Sport several years ago, and no problems. I had a chunk of tubing from a trashed frame, so I practiced on that first to get a feel for the crimping.
As far as alignment goes, a simple jig can be made by drilling guide holes in the corner of a piece of angle iron, and clamping that to the bike.
As far as alignment goes, a simple jig can be made by drilling guide holes in the corner of a piece of angle iron, and clamping that to the bike.
08-08-22, 11:53 AM
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I've rivnut-ed several of my steel frames and it works great.
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08-08-22, 11:56 AM
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I have and use both the Zephal and Minoura WB mounts with clean SS straps and no fastener on the backside. Both do have black plastic mounts that raise the cage considerably. Pluses - they work well. Put electrical tape on the straps, trim with a sharp box knife and they leave no marks at all. And for seattubes on close racing bikes, nothing sticks back to touch the rear tire.
https://www.modernbike.com/minoura-b...m-black-silver
The Zephal one I have isn't shown on their website so it may be discontinued. There are several other solutions there.
https://www.modernbike.com/minoura-b...m-black-silver
The Zephal one I have isn't shown on their website so it may be discontinued. There are several other solutions there.
08-08-22, 12:05 PM
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My solution was to drill holes and forcefully thread in two long M5 bolts. I then silver soldered them in place and cut them down to use nuts in securing my water bottle cage... Talk about a HACK... Ha
None of my Franken Bikes are "Wall Hangers"... But they are ridden and PROVEN...
As Quoted by one of our tribe: "Steel Is Real", I would not do this on anything but a steel bike.
None of my Franken Bikes are "Wall Hangers"... But they are ridden and PROVEN...
As Quoted by one of our tribe: "Steel Is Real", I would not do this on anything but a steel bike.
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08-08-22, 12:08 PM
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before I knew such a thing as "rivnuts" existed, I decided an old French frame just HAD to include waterbottle mounts, and also chanced upon a basket-case trashed Mtn. Bke frame discarded on the street.
So...with more confidence than sense I cut out the MTB factory mounts, shaped the remaining frame tubing into "diamonds", then drilled the frame tubes in French frame and brazed them on.
It turned out so nicely I was sure I was a natural for brazing and soon discovered the truth: NOT a natural, just had some unnatural good luck, like beginners do.
So, kids, don't try this approach at home!
I would also be a little leery of rivnuts, have had mixed results with them. So maybe do a practice run on a trashed MTB frame, or a piece of one.
So...with more confidence than sense I cut out the MTB factory mounts, shaped the remaining frame tubing into "diamonds", then drilled the frame tubes in French frame and brazed them on.
It turned out so nicely I was sure I was a natural for brazing and soon discovered the truth: NOT a natural, just had some unnatural good luck, like beginners do.
So, kids, don't try this approach at home!
I would also be a little leery of rivnuts, have had mixed results with them. So maybe do a practice run on a trashed MTB frame, or a piece of one.
08-08-22, 12:30 PM
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08-08-22, 12:40 PM
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08-08-22, 02:12 PM
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These? They look butt ugly to me. Not something I'd care to install on a nice vintage bike. Surely vintage bottle cage clamps are available in decent supply, yes?
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08-08-22, 04:42 PM
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I think one leg of the clamp legs is actually hinged at the mount body....
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08-08-22, 06:56 PM
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There's an easy solution for most of that; you have to file/sand the edges. You can paint the underside with clear nail polish. I also use tape when mounting them, not under the clamp, but to hold them in place while securing the clamp bolts. My '72 Torpado with the VO Retro cage:
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...
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08-08-22, 07:18 PM
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I’ve done many, many frames with rivnuts. Would do them with epoxy.
Loose rivnuts? Smear epoxy in there and re-crimp them
Loose rivnuts? Smear epoxy in there and re-crimp them
Last edited by miamijim; 08-08-22 at 07:21 PM.
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08-08-22, 08:06 PM
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I have and use both the Zephal and Minoura WB mounts with clean SS straps and no fastener on the backside. Both do have black plastic mounts that raise the cage considerably. Pluses - they work well. Put electrical tape on the straps, trim with a sharp box knife and they leave no marks at all. And for seattubes on close racing bikes, nothing sticks back to touch the rear tire.
https://www.modernbike.com/minoura-b...m-black-silver
The Zephal one I have isn't shown on their website so it may be discontinued. There are several other solutions there.
https://www.modernbike.com/minoura-b...m-black-silver
The Zephal one I have isn't shown on their website so it may be discontinued. There are several other solutions there.
08-09-22, 10:14 AM
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Beautiful PX-10, by the way.
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08-09-22, 11:03 AM
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08-09-22, 05:05 PM
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08-10-22, 07:18 AM
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I yearn for a day when someone manages to bring to market a version of this with a steel core and tightening system.
I've yet to see any of these plastic hose clamp designs that don't eventually slip or strip.
-Kurt
I've yet to see any of these plastic hose clamp designs that don't eventually slip or strip.
-Kurt
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08-10-22, 08:10 AM
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They just don't have a vintage look to them either IMHO.
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