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Spoke tension question(4 posts)

Spoke tension questionjohnnybegood
Mar 13, 2003 8:34 AM
I found my rear wheel severely out of true. It's an Open Pro on a 32h Shimano 105 hub, 14/15 DT Swiss spokes, 2X/3X, alloy nipples. I bought it from Colorado Cyclery. I did not hit any curbs or potholes. I took it to one LBS and the mechanic said he couldn't adjust it because many of the spokes had no thread left showing. I took it to another shop with a good wheelbuilder. He trued it, then called me to say that the spoke tension was 70-80 which as above the manufacturer's recommendation. He recommended reducing it. Not knowing what was right, I said OK. He lowered it to 60. He didn't specify any units, but I assume that he meant pounds-force. Does anyone know what the proper spoke tension is for the wheel I described above? Do you guys with wheelbuiling experience think that the reduced tension has weakened the wheel, increasing the chances of spoke breakage or the wheel going out of true?? THANKS in advance for your advice.
Spoke tensionburdiman
Mar 13, 2003 9:26 AM
The tension sounds about right. I build my rear wheel to approximately 125kgf (~57lbf). Don't know if that is why the wheel lost true but I have not had good luck with mail order wheels.
re: Spoke tension questionMR_GRUMPY
Mar 13, 2003 9:58 AM
High spoke tension keeps a wheel true longer and keeps the spokes from breaking. The down side is that the rim might not last as long before cracking at the spoke holes.
You didn't say how old the wheel was, but if it was new, you should have returned it to CC.
re: Spoke tension questioncyclopathic
Mar 13, 2003 12:29 PM
Mavic reccomends to use 90-110 daN, and 40-60 for initial. This is for front wheel and drive side, non-drive is ~40-50% lower.

Keeping tension lower doesn't make wheel less stiff (unless it is too low and spokes loose) and won't have effect on wheel going out of tru (unless too low). The major problem with low tension on rear wheel is breaking non-drive leading spokes.