Chain Length Calculator

Chain Pitch:

Stock Chain:

Extension (in):

Current teeth size

Stock Front:

Stock Rear:

New teeth size

New Front:

New Rear:

How to use this calculator:

Choose the correct pitch for your chain & sprockets (415,428,520,etc).
Enter your stock sprocket sizes and current chain length.
Enter the new sprocket sizes and swingarm extension (If modified).
Your new chain length will be calculated and displayed.