Wheel builds need spoke length close enough that nipples engage safely without bottoming out. This calculator estimates spoke length from rim ERD, hub flange diameter, center-to-flange distance, spoke count, and crossing pattern.
Bike Spoke Length Calculator
Estimate spoke length from ERD, hub flange, flange offset, spoke count, and crossing pattern.
How to use this tool
Measure or look up the effective rim diameter, hub flange diameter, and center-to-flange distance. Enter the total spoke count and crossing pattern, then compare the estimate against a second source before ordering spokes.
What the result means
Spoke length is sensitive to small measurement errors. Confirm drive-side and non-drive-side dimensions separately for dished wheels, and check manufacturer data when available.
Related Icebike tools and guides
- How to fix broken spokes
- Road bike wheels buying guide
- Bike wheel size guide
- Bike wheel circumference calculator
This tool is for planning and comparison. Check manufacturer limits, actual bike fit, and real ride conditions before making a safety-critical setup change.
