Rivnutting 853 Frame?

[highlandsflyer]

How happy are folks to use rivnuts on thin gauge (853) frames? Needing water carrier fittings on seat and down tube. At some point I'll silver solder them properly, but don't want straps meanwhile. Unless someone can recommend good options?

 

[winjohn]

https://freshtripe.co.uk/velo-orange-handlebar-to-bottle-cage-clamp/?setCurrencyId=1&sku=BT-0002

 

[bikeworkshop]

Just steam in there and solder them in.
Aligning and drilling the holes will take longer, you might as well just do the job once

 

[highlandsflyer]

Thinking of converting it to internal dropper too. Not done that before so I'll have to think about all that. I'm not set up for brazing for now. I know, I know..

 

[novocaine]

Hmmm, a funny one. I'd say Ali rivnuts (less force required to set) but then it's galvanic reaction concerns so you have to stay in steel.


I think I'd be tempted to overdrill the I
Holes so all the pressure is front and back, maybe with a preshaped washer front (and if you can get to it back) to spread the load.

If its a temporary fix though, I'd print a mount that zip ties to the frame. I say this, because that's what I do on the gravel bike when I use it for touring. A peice of inner tube behind it stops it slipping to much.

 

[bikeworkshop]

Thinking of converting it to internal dropper too. Not done that before so I'll have to think about all that. I'm not set up for brazing for now. I know, I know..

You can probably silver solder with mapgas, so cheap and easy to get the kit.

 

[highlandsflyer]

You can probably silver solder with mapgas, so cheap and easy to get the kit.

You certainly can, but I'm not up for the paint work at the moment. Frame needs 'altering' and some other paint as well, so I would do that once I've done all the destructive work needing done. I have at least a dozen frames needing paint. Who am I talking to though! Cry me a river!

 

[Lucidone]

My only contribution to this is my experience with Raleigh frames and rivnuts. They seemed happy to use them in both steel and titanium '97 frames but on my '99 853 frame they used brazed cage mounts. I can only imagine Raleigh liked rivnuts for economic reasons and if so why wouldn't they use them in the 853 frames in their financially precarious later years?

 

[bikeworkshop]

- Rivnut in 0.4mm hardened steel -
A warranty repair or replacement is much more expensive.