Homemade Rivnut Repairs

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Oct 5, 2022
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Situation:
The upper bottle cage nut on the downtube of my bike is spinning freely. I need the downtube for my battery mount. I was able to remove the loose screw and battery plate without damaging anything. I am a fairly capable bike mechanic, but I don't have rivnut tools or any experience with rivnut installation. I'm confident I could drill a specific size hole in the correct location. I dont't want to F up my downtube by being an idiot. There is 1 local bike shop. They are cool and good people. They are very busy with Spring bike repairs. They told me they needed to check to see if they had the right rivnuts 7 days ago, then I called 2 days ago and got the ole, "I'll call you back."

Riders can any of you share thoughts or experiences with rivnuts, DIY or other? Are they difficult to do well? Is it advised to drill a 3rd rivnut for securing the battery plate? Is it not advised to drill additional holes in your downtube?
 
Situation:
The upper bottle cage nut on the downtube of my bike is spinning freely. I need the downtube for my battery mount. I was able to remove the loose screw and battery plate without damaging anything. I am a fairly capable bike mechanic, but I don't have rivnut tools or any experience with rivnut installation. I'm confident I could drill a specific size hole in the correct location. I dont't want to F up my downtube by being an idiot. There is 1 local bike shop. They are cool and good people. They are very busy with Spring bike repairs. They told me they needed to check to see if they had the right rivnuts 7 days ago, then I called 2 days ago and got the ole, "I'll call you back."

Riders can any of you share thoughts or experiences with rivnuts, DIY or other? Are they difficult to do well? Is it advised to drill a 3rd rivnut for securing the battery plate? Is it not advised to drill additional holes in your downtube?

You can do it :)

Put your battery cradle on, mark for the third hole, drill it then rivnut it.

Here is a cheap rivnut toolkit and another link to other rivnut toolkits....







 
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You can do it :)

Put your battery cradle on, mark for the third hole, drill it then rivnut it.

Here is a cheap rivnut toolkit and another link to other rivnut toolkits....







Have you done them before? Would I need to use a size bigger if the original one has stripped? I'm pretty sure I'll be able to drill the old one out so as not widen the original hole. The videos on YouTube make it look really easy. I just want it to be right
 
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Yes, we've done a few modifications on ebike builds and regular bikes for drink holders and like you, we did the extra
rivnut for the battery cradle :)

You can do it.

Don't get into a rush, just go slow and sure when you're drilling the old one out :)

Be sure to makr the 3'rd hole and same thing, just go slow, you can do this (y)
 
As far as needing a special tools for installing Rivnuts. Get yourself a threaded bolt that fits the Rivnut you are installing, thread a nut on the bolt thread up the bolt then thread the bolt into the rivnut. Insert the bolt/nut/rivnut into the hole. Put s wrench of the head of the bolt to keep it fro rotating, then with wrench screw the nut down onto the rivnut. Continue tightening the nut until you can no longer tighten any more, then unscrew the bolt from the rivnut.

This works but is kind of a pain of you have a lot of rivnuts to install, but works fine for one or two.

Check this Youtube to see the method being used...
 
Yes, we've done a few modifications on ebike builds and regular bikes for drink holders and like you, we did the extra
rivnut for the battery cradle :)

You can do it.

Don't get into a rush, just go slow and sure when you're drilling the old one out :)

Be sure to makr the 3'rd hole and same thing, just go slow, you can do this (y)
Is it a good idea to add a third mount during the initial Ebike build for the battery cradle?
 
Is it a good idea to add a third mount during the initial Ebike build for the battery cradle?

Some do some don't.
The way i figure what i'm gonna do is really how/where the ebike will be rode..make sense?

Really depends on what you desire really..
 
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I installed a Grin Technologies Double Bob battery mount. They also have a triple but the double fit my Hailong3 battery just fine. Yes, the hose clamps can be an eyesore. The black shrink tube helps a bit, but the battery sits quite securely.

IMG_1463.jpeg
 
Thanks, I'll check those out
To elaborate … the battery sat too low on my downtube, so the bottom half of the Grin mount attaches to the bike cage mounts and I only added one of the two hose clamps to the top of the Grin mount. In the pic you can see there is no hose clamp on the bottom half. I could have added the second clamp, and I may when I start off-roading. As is, it feels secure.
 
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