Spoke length calculation question.
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Spoke length calculation question.
Hello all,
Newbie to the forums, and definitely a novice when it comes to wheel building. This will be my third build, but I'm running into a technical problem I need assistance with.
I want to upgrade the hubs on a Giant SLR-2 42 wheelset and replace them with DT Swiss 350 hubs. The flange diameter for the DT Swiss is different from the existing hub, so I will need to replace the spokes as well, probably with Sapim Sprint or Strong. The problem I'm having is that they have different numbers of spokes on each side. The wheels have 24 spokes total, but one side has 16 and the other has 8. The side with 16 has a 3X cross pattern, and the side with 8 has a 1X cross pattern. From what I've seen, all of the online spoke length calculators assume a standard configuration of 12 spokes on each side for a 24H wheel. How to I calculate the spoke lengths for a wheel like this?
Thanks in advance.
Newbie to the forums, and definitely a novice when it comes to wheel building. This will be my third build, but I'm running into a technical problem I need assistance with.
I want to upgrade the hubs on a Giant SLR-2 42 wheelset and replace them with DT Swiss 350 hubs. The flange diameter for the DT Swiss is different from the existing hub, so I will need to replace the spokes as well, probably with Sapim Sprint or Strong. The problem I'm having is that they have different numbers of spokes on each side. The wheels have 24 spokes total, but one side has 16 and the other has 8. The side with 16 has a 3X cross pattern, and the side with 8 has a 1X cross pattern. From what I've seen, all of the online spoke length calculators assume a standard configuration of 12 spokes on each side for a 24H wheel. How to I calculate the spoke lengths for a wheel like this?
Thanks in advance.
#2
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Hello all,
Newbie to the forums, and definitely a novice when it comes to wheel building. This will be my third build, but I'm running into a technical problem I need assistance with.
I want to upgrade the hubs on a Giant SLR-2 42 wheelset and replace them with DT Swiss 350 hubs. The flange diameter for the DT Swiss is different from the existing hub, so I will need to replace the spokes as well, probably with Sapim Sprint or Strong. The problem I'm having is that they have different numbers of spokes on each side. The wheels have 24 spokes total, but one side has 16 and the other has 8. The side with 16 has a 3X cross pattern, and the side with 8 has a 1X cross pattern. From what I've seen, all of the online spoke length calculators assume a standard configuration of 12 spokes on each side for a 24H wheel. How to I calculate the spoke lengths for a wheel like this?
Thanks in advance.
Newbie to the forums, and definitely a novice when it comes to wheel building. This will be my third build, but I'm running into a technical problem I need assistance with.
I want to upgrade the hubs on a Giant SLR-2 42 wheelset and replace them with DT Swiss 350 hubs. The flange diameter for the DT Swiss is different from the existing hub, so I will need to replace the spokes as well, probably with Sapim Sprint or Strong. The problem I'm having is that they have different numbers of spokes on each side. The wheels have 24 spokes total, but one side has 16 and the other has 8. The side with 16 has a 3X cross pattern, and the side with 8 has a 1X cross pattern. From what I've seen, all of the online spoke length calculators assume a standard configuration of 12 spokes on each side for a 24H wheel. How to I calculate the spoke lengths for a wheel like this?
Thanks in advance.
Edit: So I just tried this on my mobile device which I have never used for this and that feature doesn’t seem to be available on the calculator I use most frequently.
Haven’t tried it on my computer lately but it used to be there
Alternatively you can do two calculations, one for 32 spokes and one for 16.
Last edited by Dan Burkhart; 09-08-22 at 11:40 AM.
#3
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Look for a feature on whatever calculator you are using to select between Normal ( J bend) straight pull, or triplet. You want triplet
Edit: So I just tried this on my mobile device which I have never used for this and that feature doesn’t seem to be available on the calculator I use most frequently.
Haven’t tried it on my computer lately but it used to be there
Alternatively you can do two calculations, one for 32 spokes and one for 16.
Edit: So I just tried this on my mobile device which I have never used for this and that feature doesn’t seem to be available on the calculator I use most frequently.
Haven’t tried it on my computer lately but it used to be there
Alternatively you can do two calculations, one for 32 spokes and one for 16.
I will check the online calculators for the triplet feature.
Thank you.
#4
Really Old Senior Member
Are you sure the NDS is 1 cross? I'd expect radial.
Calculate for 32 and it'll assume 16 per side. Use that for your DS.
Calculate for 16 and it'll assume 8 per side. Use that for your NDS.
Calculate for 32 and it'll assume 16 per side. Use that for your DS.
Calculate for 16 and it'll assume 8 per side. Use that for your NDS.
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Looking at pics online, there does not appear to be a radial side on these.
https://www.giant-bicycles.com/us/sl...waAqcVEALw_wcB
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#6
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I did the math 15 years ago or so when I was still into triplet lacing
Get a copy of spocalc (or something else that will let you use fractions) and treat it as a 32 spoke wheel, but use 3.35 as the number of crosses on the drive side.
Treat the nds as a 16 spoke wheel as mentioned before.
Get a copy of spocalc (or something else that will let you use fractions) and treat it as a 32 spoke wheel, but use 3.35 as the number of crosses on the drive side.
Treat the nds as a 16 spoke wheel as mentioned before.
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I did the math 15 years ago or so when I was still into triplet lacing
Get a copy of spocalc (or something else that will let you use fractions) and treat it as a 32 spoke wheel, but use 3.35 as the number of crosses on the drive side.
Treat the nds as a 16 spoke wheel as mentioned before.
Get a copy of spocalc (or something else that will let you use fractions) and treat it as a 32 spoke wheel, but use 3.35 as the number of crosses on the drive side.
Treat the nds as a 16 spoke wheel as mentioned before.
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It is definitely not a radial, and there is definitely 1X on the NDS for the rear wheel. It is reversed for the front wheel. The 8 spoke side is on the DS.
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The wheels have 24 spokes total, but one side has 16 and the other has 8. The side with 16 has a 3X cross pattern, and the side with 8 has a 1X cross pattern. From what I've seen, all of the online spoke length calculators assume a standard configuration of 12 spokes on each side for a 24H wheel. How to I calculate the spoke lengths for a wheel like this?
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Yes, this is the equation given by Musson in his on-line book on wheel building. For radial you set x=0, and the cosine of zero is 1, and go ahead and calculate L. It can easily be different designs for the two halves of the wheel. The equation does not comment on the wisdom of all the different choices which might be made, but the book does. I used it to select spokes for my 40/32 spoke Rudge club-style wheels, with replacement aluminum rims.
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Look for a feature on whatever calculator you are using to select between Normal ( J bend) straight pull, or triplet. You want triplet
Edit: So I just tried this on my mobile device which I have never used for this and that feature doesn’t seem to be available on the calculator I use most frequently.
Haven’t tried it on my computer lately but it used to be there
Alternatively you can do two calculations, one for 32 spokes and one for 16.
Edit: So I just tried this on my mobile device which I have never used for this and that feature doesn’t seem to be available on the calculator I use most frequently.
Haven’t tried it on my computer lately but it used to be there
Alternatively you can do two calculations, one for 32 spokes and one for 16.
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