I just installed several of these on my bikes for my class. It does not make any sense that reading would change whether the bike is right side up, or turned over. If it is not recording speed, there are a couple of things that you can check. Like someone else mentioned, check the contact with the computer and the mount on the handlbars... although if it is recording cadence then the contact should be fine. I would check to make sure that the magnet on your rear wheel and the sensor are lined up... that is what will give you speed. They need to be very close in order to give you the speed. If that doesn't help, then perhaps a trip to LBS will alleviate any more issues. It's a great quality computer, so I hope it's working for you soon![]()



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