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Archive for month: January, 2009

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Spoke Length?

this entry has 13 Comments/ in Do It Yourself, History, How It Works, Reflections, Wheelbuilding Tips / by Ric Hjertberg
January 26, 2009

It’s so easy, these days, to establish the exact spoke length for any wheel. Just visit one of the Web’s many free calculation sites (DT’s, for example). But it wasn’t always so easy; in fact, the correct lengths were hard to discover, closely guarded secrets. For more than a century, wheel builders relied on charts and notebooks filled with observations. That’s the wheel world I entered in the early 1970’s, and here’s a glimpse.

For those of you who don’t build wheels, let me mention that the spoke length needs to be within a millimeter, less than 1/3 of one percent accurate. Otherwise you run the risk of too long (pops your tire) or too short (unsightly and weak) spokes. Compounding the task, manufacturing tolerances of rims, spokes, and hubs vary and they stretch and deform during building. With such a moving target, a tiny error in length calculation can become a time consuming failure. Here is the basic mathematical formula for spoke length determination: Read more →

A New Year

this entry has 0 Comments/ in Reflections, Wood Rims, Workshops / by Ric Hjertberg
January 2, 2009

Welcome to 2009, everyone. If ever a year was stacked to exceed expectations, this is the one, if you know what I mean. What resolutions have you made? Besides wishing for more (more miles, more bikes…) I hope you’ve included a measure of serendipity in your resolutions.

In 2009, I hope you encounter a new form of cycling. Is it fixed gear, commuting, 29R, restoration, humanitarian, 3rd World travel, invention? Will this be the year you build a frame or wheel? Will you try piloting a tandem for a blind friend; sell an unused bike for less than it’s worth to someone deserving? The list is limitless. Cycling is just that way.

As for me, I began the season by leaving Full Speed Ahead after nearly six years. Read more →

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