ERD Measurement
By Tandell Bikes
August 8th, 2023
ERD: Effective Rim Diameter,important data when you calculate correct spoke length.
We measure ERD here include nipple head 2mm*2 of 14mm flat nipple,so if you use 14mm flat nipple,you can use ERD data shown on website directly.
If you use internal nipple,please minus 4mm of ERD shown on website,then add the internal nipple length*2.
If you use double square nipple,add 2mm to the spoke length you calculated.
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