CatEye, Cycling Computer /Altimeter - AT-100 All Mountain Bikes >>> Mountain Bikes by CatEye More details and ordering info. The Cateye AT100 not only is a cycling computer, it's a altimeter. If you want to keep track of current altitude up to 17400 feet, trip gain, and total gain this is a unit for you. User input on Cycling Computer /Altimeter - AT-100 by CatEye: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines