losi

Hi all,
I get a second hand 28" rear wheel. Unfortunetly the outside spokes on the chain side (chain fall can be the reason) half broken. (9 all together)
Like to buy 9 spokes and change them. Qustion is how to do?
What order open the spokes? How much to open? (Think all)
What order to have tight them after set the new ones inside?
What important to know more about the change?
Thanks a lot.
losi

dbg

28 inch? Either way you should rebuild entire wheel. Are you good with puzzles? It's a fun challenge.

fietsbob

the cassette/ freewheel is off, right?
loosen all the spokes somewhat , and bend the last 25% of the spokes.
to get them in and crossing their opposites as required.

have built quite a few wheels by using the soft flexibility
of the stainless steel wire spokes are made of.

Just make the bend smooth and all will go fine.

I use Anti seize on the spoke threads , to insure they come up to tension smoothly.
less spoke wind-up. since you are that far into it , one at a time you can remove the remaining spoke nipples , and grease the threads of the other spokes .
factory , machine built wheels are usually assembled dry.

Bezalel

If someone was riding a wheel with 9 broken spokes on the drive side the tension on the non-drive side spokes must be extremely low. It might be time to replace all the spokes.

losi

Thanks dbg, fietsbob, and bezalel,

dbg, I also understood so (to loose all the spokes) I have really rebuilt it and for that I ask here not to start with mistake.
fietsbob, very good ideas, I thought use oil and really do not know yet what is "Anti seize" you mean.
My question is in what order best loose the spokes? (For not or less bend the wheel for loose the tension)
Bezalel, they broke half, I mean they are still together so one that not care about the life can use the wheel)
losi

jim p

I think that you are wanting to know which spokes to detension first so that you don't further damage the rim. This is only a guess but I would loosen the drive side spokes opposite the broken spokes first by one turn and then loosen the other drive side spokes by one half turn and repeat the process until all the spokes on the drive side were lose. I would not loosen the non drive side spokes because as the drive side spokes are loosened the tension will be removed from the non drive side spokes as the hub moves toward the non drive side.

I have been able to buy single spokes at a bike shop. If you only want to replace the broken spokes, then take a good spoke from the drive side to your bike shop and see if they have any of the correct length and size. The last time that I bought spokes they were around $1 each. They probably cost more now.

MichaelW

Check some of the wheelbuilding guides.
Remove your cassette or freewheel (2 different designs using different removal methods).
Take the wheel to a bike shop or measure up the require spoke length yourself.
Remove the broken spokes.
Thread the new spokes in place, lacing them with the same pattern as the existing spokes and tighten gently.
You need to tighten them so they are roughly the same tension as existing spokes. Twang the spokes and listen to the note. Its best to tighten each one a small amount rather than get each one to the right tension individually.
Once you have the tension roughly correct, you can check the trueness.

losi

Thanks jim p and MichaelW,
These answers I was need exactly to start. Before start I will check and note the tension of the spokes so will be more easy to put them back and tension them for similar.
The links I was search but not find. They are very good ones.
After take off the half broken will buy and will put carefully back.
Will do it next week.
losi

bradtx

losi, Here is a general guide https://www.parktool.com/blog/repair-...nd-rim-service . While it contains more than what you need, it'll give you a good overall understanding.

I've taken one of the good spokes to the LBS (Local Bike Shop) for replacements, be aware that drive side spokes may be a different length than the non drive side spokes.

Brad

PS If you don't have any of the special tools needed the LBS shouldn't charge much to remove/reinstall the freewheel/cassette

losi

Hi bradtx,
Also thanks for link and advise. To tak off and set the cassette I have no problem. that service I am doing but never had such a problem until now.
Will start next week.
will come back to report.
losi