Single speed rear wheel spoke tensions?
06-28-16, 04:54 PM
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Single speed rear wheel spoke tensions?
I'm building a single speed rear mtb wheel with a symmetrical hub, equal spoke lengths on each side. I'm curious if I should tension both sides to where I'd normally tension the DS spokes on a freehub wheel, or if I should drop both sides down a bit so that the total tension on the rim is the same as a freehub wheel?
I.e. set the tension on each spoke to the average of DS and NDS spoke tensions on a freehub wheel.
I.e. set the tension on each spoke to the average of DS and NDS spoke tensions on a freehub wheel.
06-28-16, 11:08 PM
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I do the average thing, and I think it's the most common.
Although I seem to remember one poster here shooting for DS tension both sides.
Not all rims can take both sides DS tension w/o taco-ing.
Be aware that a SS hub might not be perfectly symmetrical, even if it uses the same length spokes.
Last one I built needed a 10% spoke tension difference DS / NDS to center correctly.
That was a coaster brake hub though.
Although I seem to remember one poster here shooting for DS tension both sides.
Not all rims can take both sides DS tension w/o taco-ing.
Be aware that a SS hub might not be perfectly symmetrical, even if it uses the same length spokes.
Last one I built needed a 10% spoke tension difference DS / NDS to center correctly.
That was a coaster brake hub though.
06-28-16, 11:12 PM
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On most modern rear wheels, builders bring the drive side tension higher than they'd like. That's because it's the only way to get the left side tension high enough.
On a symmetrical hub, freed form concerns about inadequate left side tension, I drop down to tensions nearer to 80kgf (using 20./1.8 DB spokes). I might go higher with 2.0 straight spokes, but I build with those so rarely that I don't think about much.
On a symmetrical hub, freed form concerns about inadequate left side tension, I drop down to tensions nearer to 80kgf (using 20./1.8 DB spokes). I might go higher with 2.0 straight spokes, but I build with those so rarely that I don't think about much.
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06-29-16, 10:07 AM
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On most modern rear wheels, builders bring the drive side tension higher than they'd like. That's because it's the only way to get the left side tension high enough.
On a symmetrical hub, freed form concerns about inadequate left side tension, I drop down to tensions nearer to 80kgf (using 20./1.8 DB spokes). I might go higher with 2.0 straight spokes, but I build with those so rarely that I don't think about much.
On a symmetrical hub, freed form concerns about inadequate left side tension, I drop down to tensions nearer to 80kgf (using 20./1.8 DB spokes). I might go higher with 2.0 straight spokes, but I build with those so rarely that I don't think about much.
I was thinking something more like 90-100 kg since I'd normally do 120-130 kg on the DS. I can't really find any specs for my rim regarding max tension, mavic xm317 (nondisc). I'm using 36x 2.0/1.8 DB spokes.
