I own a Sigma 1200. I really like it but the battery finally died and I replaced it and had to relearn how to program it. I have 700x38 for my hybrid, so the setting was 1374 to convert it to MPH. I'm kind of a detail person so I tested it with two different car odometers. The bike computer was well short of a mile. e.g. 100-150 feet. To get the computer to a mile I had to fib and tell my computer the tires were a full two inches shorter than they are!! That's WAY off. Yes, I've measured from top of tire to bottom...not the wheel. I've triple checked Sigma's formula and it is correct. But I wonder if Sigma programmers dialed in the wheel size and not the tire...not following their own directions. I have not taken the bike to a running track yet to check distance.
But is the computer wrong? Have you really checked your bike's odometer? Was it close? Any other problems w/ Sigma? Any ideas?
Todd
But is the computer wrong? Have you really checked your bike's odometer? Was it close? Any other problems w/ Sigma? Any ideas?
Todd