Proper chainline is essential to smooth single-speeding. That's precisely why the Endless Bike Fibonacci Spacer kit has been designed. Any chain line can be achieved within an accuracy of +/-1mm using the kit -- its clean look and complete functionality adheres to the single speed creed of simplicity and purity. The Endless Bike Fibonacci Spacer kit includes eight precision machined spacers in millimeter width of Fibonacci numbers 1 through 21. To simplify the kit while ensuring a perfect chainline for any crank, bottom bracket, chainring, and rear hub combination, this series of widths is an absolute guarantee that you will have what you need to set up a perfect chainline. Any width needed can be achieved using three or fewer spacers placed inboard of your cog.
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