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Truing DT Revolution spokes(4 posts)

Truing DT Revolution spokessteveF
May 5, 2001 6:53 PM
I recently had a wheelset made that included Record hubs, Open Pro rims, and Revolution spokes. Upon delivery I was told that those spokes require more checking/truing for awhile because they twist when first tightened and try to untwist until they "set in." I was told that most shops don't know how to properly work with those spokes because they are set at lower tension that other spokes. Also that this tension should be checked with some kind of gauge.

Is there any truth in all this and do I need to seek specific shops to be certain that these wheels are trued correctly? Thank you!
re: Truing DT Revolution spokesJohnG
May 5, 2001 11:59 PM
All spokes "wind up" when they are first tensioned. However, a good wheelbuilder will know how to release the spoke wind up during the build.

When I built my Revo spoked rear wheel I flexed rim the during the spoke tensioning process in such a way that the spoke twist was removed. An old wrench told me how to do this. Seemed a bit severe but I can't argue with the results. I've got about 500 miles on the rear wheel and it's still perfectly straight. I don't think there is anything special about this build.... as long as you aren't mega heavy or Cipo ;)

JohnG
true your own wheels...dave
May 6, 2001 7:06 AM
Trueing wheels is one of the first things any cyclist should learn. It's a pain if you have to take your bike to a shop every time it needs a minor adustment. The revolution spokes (14/17 gage) do twist a lot easier that 14/15's. The wisdom of using them on the right rear, where tension is highest, is questionable. I had a set of 28H CXP-33's built with all revolution spokes, and they held up fine, though. When trueing the right rear spokes, I use a pair of pliers with padded jaws to grip the spoke, and keep it from twisting. I padded the jaws with .010 aluminum shim stock, to avoid damage to the spoke. If you scratch up a spoke with pliers, it's likely to fail quickly.
Close enough, but not exactly right.Spoke Wrench
May 6, 2001 7:45 AM
I think that a lot of wierd stuff that people tell you about bicycle wheels is just close enough to the truth that it contributes to the wheelbuilding mystique. According to Wheelsmith, as I understand it, the optimum spoke tension is the same regardless of what spokes are used. Your Revolution spokes should use the same tension as ordinary 14 straight gauge spokes.

How do you know what the tension is? You use a tensiometer. A tensiometer is a gauge that measures how much a given pressure will bend the spoke. The more tension on the spoke, the less it bends. Also, skinny wire bends more than fat wire. The result is that a light gauge spoke with the same tension will deflect more than a heavy gauge spoke which will show up as a lower reading on the tensiometer.

I seldom get to see wheels I have built unless they have been seriously thrashed (my sons like to do big drop offs on their mountain bikes). I wish more people would bring them back to me after a period for me to check over. I think I can learn a lot that way. If you have any doubts about your high end wheelset, I'd recommend taking them back to the guy who built them.