Computer going crazy

rodgers73

The speedo is jumping about a lot - one minute its normal reading, the next its going through the roof (70/80mph etc).

It's the usual cordless style, bought off Ebay for a fiver. Was working ok until I moved it to my new bike.

Think it might be the sensor being a little too far from the computer??

woodywmb

Something's interfering with the signal. Watch. Mobile. Or someone else cycling with you and using a wireless computer. Then again if you're actually doing 70/80mph it's working fine.

sicknote

I would also check to see if your lights are doing it too as the Smart front light did the same thing too mine.

Peddle Up!

Batteries OK?

JohnCleland

Same problem, was the lights in my case.

I just moved them apart, no probs since.

rodgers73

Got one light on the front that was on the old bike with the same speedo - worked fine then. But also got new Smart light on front that could be causing it.

Batteries are only a couple of months old.

IndyBike83

I'm new to biking, but I'm used to interference. I play a lot of instruments. Yeah, I would check the batteries first thing. If it's not that, then something is messing with your signal. And at least instrument wireless can be very picky.

dag_on_a_bike

Used to have that problem too, but only at traffic lights. Induction loop put me at 78mph...stopped at a red light.

brit66

I get the same problem but only when commuting home - never in the morning. I've never reaslised why until I read this thread.

It must be the fact that I have my front light on when I cycle home.

Wulz

Ive noticed my cateye computer going nuts at lights also. i rekon its noise coming from the alternators of cars and trucks.

Willie

zanes

My suspicion is that a lot of madness at lights or at rest is caused by the sensor magnet being stopped near the sensor, and subconscious movement of the bike is drawing it back and forth over the sensor rapidly causing it the computer to clock silly speeds.