I have a wireless that I bought before I went with the cable set up. The wireless does have limitations like the distance of the sensor to the unit and I worry also of the interference that are caused by other devices out there such as garage door opener signals, etc. I have more confidence with the wired model and in fact I need to add another computer just to see if the one I have now is accurate. I found out the other day when I have the computer and GPS mounted side by side, they did not agree on the total mileage I rode. GPS odometer showed 50 miles whereas the cycle computer showed I did 66 miles. Electrical interferance caused the disparity? Your thoughts please.