Bent spokes ...

[danfoto]

As in ...



The wheel still runs dead true and is still exactly concentric with the hub. Can I get away with carefully squeezing them straight by means of a small steel vice with ally jaw liners?

 

[Woosh]

bent spokes protect against excessive tension and are usually found on fragile rims like carbon rims.

 

[danfoto]

Sorry, I don't understand. These spokes have got bent. They are not meant to be bent.

 

[Woosh]

Were they straight before?

 

[saneagle]

Is that a DIY build/kit motor wheel? The problem is the eyelets in the rim hold the nipples at right-angles, which is not the angle the spokes want to go.

If it was a DIY build, maybe the builder bent them so that they lined up with the nipples, but sometimes they do that when you tighten the spokes. No point in trying to straighten them. you'll only make it worse.

 

[danfoto]

They got bent by accident. That's the rear wheel of a 2022 Gazelle ebike.

 

[Woosh]

Your plan seems OK but you should procure a couple of replacement spokes before attempting to straighten them.

 

[Nealh]

One will have to remove a good spoke to get the length correct before ordering replacements.

 

[cyclebuddy]

The wheel still runs dead true and is still exactly concentric with the hub.

This doesn't make any sense to me. How can the rim be true and concentric when the spokes have been bent when previously they weren't, and they're not supposed to be? Clearly the spokes have undergone some compression to bend them, so the rim cannot now be true/concentric. Logic suggests you've hit something hard to cause that; it's not a natural phenomenon.

I hope someone can explain?

 

[Woosh]

I hope someone can explain?

we need a picture of the whole wheel.

 

[danfoto]

This doesn't make any sense to me. How can the rim be true and concentric when the spokes have been bent when previously they weren't, and they're not supposed to be? Clearly the spokes have undergone some compression to bend them, so the rim cannot now be true/concentric. Logic suggests you've hit something hard to cause that; it's not a natural phenomenon.

I hope someone can explain?

I think you're over-thinking this. If you're anywhere in East Sussex, you're welcome to come and see for yourself. No need to bring a dial gauge - you can use mine

 

[guerney]

Bending certain metals back and forth too much, causes them to become more brittle and more likely to break. If it were my bike, I'd replace all the bent spokes.

 

[cyclebuddy]

I think you're over-thinking this.

I probably am. But it's not my life on the line when the spokes shear and the wheel collapses on a fast downhill descent!

 

[sjpt]

This doesn't make any sense to me. How can the rim be true and concentric when the spokes have been bent when previously they weren't, and they're not supposed to be? Clearly the spokes have undergone some compression to bend them, so the rim cannot now be true/concentric. Logic suggests you've hit something hard to cause that; it's not a natural phenomenon.

I hope someone can explain?

It certainly looks as if the spokes have had a significant knock of some sort, and I agree with the comments that its best to replace them. But I can see how some bad forces on the wheel could bend the spokes fairly evenly; leaving the wheel reasonably concentric and true. Removing a very stubborn freewheel is the only thing I can think of that could cause such a big but relatively even shock.

 

[Sturmey]

As in ...

View attachment 50588

The wheel still runs dead true and is still exactly concentric with the hub. Can I get away with carefully squeezing them straight by means of a small steel vice with ally jaw liners?

What gauge are the spokes?
e.g. 14g is 2mm diameter, 13g is 2.3mm, 12g is 2.6mm