This handy tool allows you to enter multiple shimano part numbers and it will tell you if shimano says they are compatible.

Our print out checklist to help you when building a custom bike.

Spoke calculator for building custom wheels

For ALL things bike.

Specs, measurements, history, and more.

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

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.

The DTD is a list of shops and builders around the world who offer bicycle frame modifications and repairs.

Comparison site with many many different shapes and styles of handlebars

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