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How to Choose Spokes For a Bicycle Wheel

Updated on April 19, 2013

Spoke Lengths Made Easy

There seems to be a lot of confusion surrounding selecting the correct spoke length for building a bicycle wheel.

Selecting a spoke length needn't be difficult or confusing at all. There are several methods of arriving at the correct spoke length. All you really need is some simple information to help you to choose the correct length every time.

All the information that you need is contained in this article.

Measuring a Spoke

.. and the easiest method of selecting the correct spoke length

A spoke should be measured from inside the bend to the very end of the spoke including the thread.

If you're rebuilding an existing wheel and you aren't changing the spoking pattern you can select the correct spoke length by removing one of the existing spokes and measuring it.

If you need to cut the spokes out you will need to cut just one spoke initially so you can measure the two halves. Once you have cut more than one spoke it might not be possible to decide which parts are from the same spoke.

This is the easiest way to determine spoke length and I always use this method whenever possible.

Building Your Data

Recording what you have built

As you build wheels you will find that you get to know which spokes to use because you have built something similar before. Whenever you build a wheel write down all of the details of that wheel for future use.

You will need to make a note of:

Exact model and size of rim

Exact model of hub

Spoking pattern (3 cross, 4 cross)

Number of spokes

Front or rear

and don't forget to add the length of spoke you used. :-)

If you are good with computers you could record the information in a database or spreadsheet. Alternatively you could record it in a notebook.

Use Your Existing Knowledge And Experience

If you don't have any previous knowledge still read this section

If you build wheels regularly you will get a feel for which length you will need for at least the most common rim and hub combinations.

Two of the most common combinations are:

700c on small flange hub = 295mm

26 x 1.75 (ATB) on small flange hub = 263mm

These measurement are based on a 36 spoke wheel built 3-cross and are approximate but will give you a good start. A rim with a deeper section than standard will take a slightly shorter spoke.

As you build your experience these combinations, and others, will become second nature as will the amount to shorten or lengthen your choice based on variations from normal.

Best Kept Secret Exposed!

Spoke length is not critical. It is possible to be 2mm either side of the theoretically correct length and still build an excellent wheel.

My Methods for Selecting Spokes - These are the methods I use in my workshop

  1. Measuring a spoke from an existing wheel.
  2. Selecting a spoke length from my existing data of previous builds
  3. Estimate the spoke length from my personal experience of wheel-building. Try it and reselect the correct length if necessary.
  4. Use a spoke calculator program

Use a Spoke Length Calculator

There are times when a wheel is so different from the usual builds that it is very difficult to decide what spoke length to use. Years ago we used to start with our best estimate then experiment until we found the correct length.

These days computers make life a lot easier. There are several spoke length calculators available online. Some are not all that good, but there is one calculator that is simple to use and produces correct results every time. This is the calculator that I use:

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    • profile image

      Krista 2 years ago

      just started reading, but I am really hoping with a HOW TO... actually replace the spokes, now that I know which tools I need and which spokes to choose. Thank you.

    • ColwoodWheelWorks profile image
      Author

      ColwoodWheelWorks 4 years ago

      @anonymous: As a 700c wheel is sometimes referred to as a 28" wheel they may well be right. (There is also a 28" wheel fitted to older roadster bicycles which is a different size.) Not all 700c rims have the same section profile which would also affect spoke length slightly. With these sorts of builds it's a case of try it out and see if it works, or use the spoke length calculator that I suggest above.

    • profile image

      anonymous 4 years ago

      I am buying a ele. hub for my 700c front wheel.

      The supplier insists that the supplied spokes for 28" wheel would work also for my 700c.

      Is this correct ?

      thank you

    • profile image

      CarlittoDunaway 5 years ago

      That is something I have not done yet. Thanks for tips!

    • profile image

      anonymous 5 years ago

      Great

    • profile image

      anonymous 5 years ago

      I don't have a bike, but what an interesting lens, nicely done!

      Blessed by a Squidoo Angel

    • Brandi Bush profile image

      Brandi 5 years ago from Maryland

      Another excellent bike lens! :)

    • SusanDeppner profile image

      Susan Deppner 5 years ago from Arkansas USA

      Love this niche topic information for bicycle owners!

    • profile image

      anonymous 5 years ago

      The right spokes make a big difference. Good article.

    • profile image

      anonymous 5 years ago

      interesting info

    • flicker lm profile image

      flicker lm 5 years ago

      Interesting article on choosing spokes! Well done!

    • MomwithAHook LM profile image

      Sara Duggan 5 years ago from California

      Fantastic. I have a brother-in-law who is into repairing bikes. This is perfect for him.

    • ItayaLightbourne profile image

      Itaya Lightbourne 5 years ago from Topeka, KS

      Wonderful 'how to' article! :)

    • evelynsaenz1 profile image

      Evelyn Saenz 5 years ago from Royalton

      This is just the kind of information some budding bicycle mechanic would love to read.

      Squid Angel Blessed!