Welcome to my new Retul Muve fit bike! I recently replaced my older Serotta and Exit fit bikes with a new bike from Retul. This allows me to be able to put someone on the fit bike and come up with numbers that we can directly use in the search for a new bike. Stack and Reach measure the distance vertically up from the crank center and then horizontally forward to the center of the head tube.
Most bike companies list Stack and Reach in their geometry of each bike. This will allow us to make sure you are going to purchase the correct bike!