Author Topic: spoke ripped out of rim on pit bike wheel  (Read 301 times)

Tinworm

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spoke ripped out of rim on pit bike wheel
« on: 16 Aug 22, 08:31 pm »
I dropped a pit bike wheel. I had a propped things up to see what they'd look like and everything fell off the table, when I knocked it. A spoke on one wheel buckled and pulled out of the rim.

see picture

Bit discouraged by how easily that rim opened up, but can anything be done? Hoping that I don't have to replace the whole wheel, but how would a replacement spoke be retained? Anyone ever been able to do a repair?
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

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jim

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Re: spoke ripped out of rim on pit bike wheel
« Reply #1 on: 17 Aug 22, 05:35 am »
If there is enough metal on the rim around the spoke hole to pein back over and maybe a thin washer shaped to the dimple on the outside.
If you can drive round corners, you're not going fast enough.

Tinworm

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Re: spoke ripped out of rim on pit bike wheel
« Reply #2 on: 17 Aug 22, 09:31 am »
If there is enough metal on the rim around the spoke hole to pein back over and maybe a thin washer shaped to the dimple on the outside.

Worth a try. Hope my welding can be dialed back sufficiently. That steel seems pretty puny.
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Chris Brown

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Re: spoke ripped out of rim on pit bike wheel
« Reply #3 on: 17 Aug 22, 12:23 pm »
You could always braze it rather than welding, less chance of scrapping the rim.

Tinworm

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Re: spoke ripped out of rim on pit bike wheel
« Reply #4 on: 17 Aug 22, 12:39 pm »
You could always braze it rather than welding, less chance of scrapping the rim.

Not in my skill-set, unfortunately. And not got the kit, but I am sure you are right that it'd be less aggressive, Chris. I will look into whether I know anyone who might be able to do it for me, locally.
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

TheGiantTribble

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Re: spoke ripped out of rim on pit bike wheel
« Reply #5 on: 18 Aug 22, 10:30 am »
Brazing is an excellent and very these days undervalued system of joining metal.
The lower temperatures mean less distortion...heck they even used to braze racing
car chassis together.

Chris Brown

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Re: spoke ripped out of rim on pit bike wheel
« Reply #6 on: 18 Aug 22, 11:28 am »
The rim will be easy to heat, so all you need is a reasonable size blowlamp, brazing rods and flux, it's effectively a hard soldering process. https://www.ebay.co.uk/itm/304577065166?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=pD0Fp8EMSsm&sssrc=2047675&ssuid=GMBgc09hQ5a&widget_ver=artemis&media=COPY

Tinworm

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Re: spoke ripped out of rim on pit bike wheel
« Reply #7 on: 18 Aug 22, 01:32 pm »
I think you are right, Chris. I am going to give it a go. I just took it over to my friendly motorbike repair man (a flying mate) and he took the tyre back off. I will get some spokes and a brazing rod and give it a go. Cheers for the link etc
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Chris Brown

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Re: spoke ripped out of rim on pit bike wheel
« Reply #8 on: 18 Aug 22, 01:59 pm »
You're welcome, apply the flux and get the rim up to temperature before applying the rod, it really is just like soldering at a higher temperature.

Tinworm

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Re: spoke ripped out of rim on pit bike wheel
« Reply #9 on: 18 Aug 22, 02:16 pm »
I got the impression the flux is built in to the rod?
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

Chris Brown

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Re: spoke ripped out of rim on pit bike wheel
« Reply #10 on: 18 Aug 22, 04:03 pm »
The listing says free flux, rather than flux coated or core, so I assume it comes as a powder. There are flux coated and cored rods available, this is just the first listing I came across.

RhysN

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Re: spoke ripped out of rim on pit bike wheel
« Reply #11 on: 18 Aug 22, 05:11 pm »
Peter if you want some rod and flux yell out. I have several kilograms of rods and a big pot of flux.
We must avoid torturing our brains with false problems, it occupies but it can annoy. In jest!

Tinworm

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Re: spoke ripped out of rim on pit bike wheel
« Reply #12 on: 18 Aug 22, 06:56 pm »
Thanks Rhys, I appreciate the sentiment, but practically speaking, it might just be easier to get some on ebay. A mate down here says he does brazing, so he probably has some too.
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter

RhysN

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Re: spoke ripped out of rim on pit bike wheel
« Reply #13 on: 19 Aug 22, 09:23 am »
I just don't get i sometimes! Offered for free, but Ebay is easier :)
We must avoid torturing our brains with false problems, it occupies but it can annoy. In jest!

Tinworm

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Re: spoke ripped out of rim on pit bike wheel
« Reply #14 on: 19 Aug 22, 07:43 pm »
I wish you wouldn't choose to be offended. Would I collect it from you (we live counties apart) or would you post it, which costs, etc. Meanwhile, as I also said, my friend who does brazing has some.
I don't want to bore you all with the details, here. But if you are interested, have a look at my blog https://peteskart.blogspot.com/

-Peter