How to use the tool

The tool measures your position on the bike, and the App turns those measurements into the numbers a bike fitter would use. Together they let you record a position once and repeat it exactly: on the same bike after a rebuild, or on a different bike entirely.

The ruler comes in two pieces, so it stores easily and travels with you, and the phone holder sits on the front of the ruler so you can switch between the saddle and the handlebars quickly.

Once the tool is assembled, the next step is to install the App. Download it from the App Store or Google Play. It walks you through each measurement in the right order, stores as many bike profiles as you need, and does all the maths for you.

You don't need the tool to use the App. You can also use it with a tape measure and a cardboard template if you are willing to take more time through the process.  The guidance in the app covers both

Measurement Process

Set up a reference profile in the app, either from your bike fit data or by measuring the bike you get on best with. Then create a profile for each of your other bikes and measure them the same way, then set them up to match the first bike.

See the following pages in order for details on each measurement. The saddle position matters most. If you have handlebar position specification from a bike fitter, measure that too. If not, focus on the final hand position: