Spoke Calculator

What length spoke do you need?

To find the right spoke length for your wheel-build we recommend using spoke calculators available online. We’ve listed some useful information below to help you with your calculations. Most of our rims are asymmetric, so be sure to round the drive rear and disc front side up 1mm. Please send us an email with your build info, or fill in the form at the bottom of this page, if you would like us to double-check your spoke length if you are unfamiliar with the process.

Here Are A Few Calculators That We Recommend

If you are using DT Swiss hubs use the DT Swiss spoke calculator.

Use the Onyx calculator by finding your hubs then hit the spoke calculator button lower down on the product page. Keep in mind they list the drive spokes on the left side and non-drive on the right side. That’s backwards compared to other calculators.

For other hubs, use the Pro Wheel Builder Spoke Calculator. You can input a random hub and modify the dimensions to use this calculator if needed. We’ve compiled our popular hub dimensions here.

A Few Tips to Using Pro Wheel Builder

  1. Leave the “rim manufacturer” and “rim model” fields blank.
  2. Be sure to double-check the hub measurements as some are off.
  3. We have found it safest to always round up to the next longest size. The asymmetric profile does make the drive rear/disc front spokes ~1mm longer than usual, and the disc rear/drive front ~1mm shorter than usual, but it’s not a drastic difference.
  4. If you’re not sure if your calculation is right, please check with us and we can send you a link of confirmed spoke sizes for a variety of hubs.

 

What are the ERD’s of our rims?

You’ll be asked to enter the Effective Rim Diameter (ERD) of our rims. We’ve listed them here for you.

TR41

29″  ERD  590      27.5″  ERD 553

TR37

29″  ERD  600     27.5″  ERD 562

TR32

29″  ERD  600.5

CR35/HR35

700c  ERD  573

CX28

700c ERD 595

TR28

29″  ERD  592

TR38

29″  ERD  591     27.5″  ERD 553

TR36

29″ ERD  592     27.5″  ERD 555

TR33

29″  ERD  593     27.5″  ERD 555

*TR45 is no longer available on our website its ERD is 575.

Get Some Expert Help

Still unsure what length of spoke you need?

Please fill out the form below and then we will let you know what spokes you should buy. We only build, sell, and calculate sizes for J-bend spokes, not straight pull.

Spoke Length Form
First
Last

Front Wheel

For brands like Chris King, specify LD or SD. Is it a Large diameter or small diameter shell?

Rear Wheel

For brands like Chris King, specify LD or SD. Is it a Large diameter or small diameter shell?
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