Originally Posted by gnome
I am building up a Raleigh twenty as a fixed gear commuting bike for winter. As it is going to be for winter I am putting a hub dynamo on the front. The dynamo will either be a S-A Dynohub or a Shimano DH3N20 dynamo hub. I want to run a basic computer so that I can accurately log my distance and speed. Will the magnets in the hubs interfere with the computer sensor?
if it's a wired connection, it won't. I have a Schmidt dynamo hub with a Cateye Mity 8 computer and the two play together just fine. The Mity's sensor is on the front wheel.
I've heard of flakiness with wireless computers as interference can cause the computer to either stop registering your speed or tell you that you're going 50 mph while stopped at a red light; but that can occur even if you don't have a dynamo. I don't know if adding a dynamo will increase the likelihood of that, but I've never had a problem with a wired bike computer.