You have the abilities of a master mechanic to build your own personal dream bike. Our proprietary WS Logic™ software (patent pending) is the first of its kind to offer only compatible component selections every step of the way. It's like having your own master mechanic at your beck and call to insure that you never end up with bike components that don't work together. WrenchScience.com automatically finds all the compatible parts for the frame, fork, and components you choose, with a running price and weight tally as you build.