The Precor 9.31 is an old treadmill and is no longer available for sale. You can check out all of the latest Precor treadmills here to decide which is right for you.
The Precor 9.31 model includes the latest technologies signed by Precor. A powerful motor, a belt that adjusts to your foot stride, renowned high quality and sustained reliability confirm that 9.31 is a treadmill worth buying.
This is a machine designed for professional runners. Stay tuned to find more about the advantages of this treadmill. Go to Conclusions for a complete impression on the Precor 9.31 treadmill.