• Wolf tooth BCD printout

    A handy printout to work out a chainring or crank BCD if you are unsure.

    Can be easier to lay the chainring over the printout.

    Scroll down to the BCD Guide

  • Sheldon Brown

    For ALL things bike.

    Specs, measurements, history, and more.

    If it isn't here, you might not need it.

  • Shimano SI

    For all things Shimano, check their compatibility charts.

    Every shimano part should have a part number stamped on it somewhere. Use that to search by part number on the top right.

  • What Bars?

    Comparison site with many many different shapes and styles of handlebars