I subconsciously let go of the handle bars today without any thought of how the bike would react, the front wheel began wobbling violently. Is there a technical or e-biker term for this??
Andrew, the technical terms are wheel wobble, head shake or handlebar wobble and this can sometimes occur if the tension of the spokes are uneven.
It can also occur when the tyre is not running true or has not been correctly seated on the rim.
Check that your spokes all make a similar sound when tapped, if they're all nice and snug
(and even), spin the front wheel and watch the tyre carefully to see how true it runs. My Schwalbe "Crazy Bob" rear tyre is definitely not as true as the rim, but I don't seem to have any problems with it.
Might be a good idea to also check that the rear wheel alignment is correct
(it should be nicely in-line with the frame).
And don't forget to let us know
if you find the cause.
I said "if" instead of "when" because I'm being realistic, I have the same problem on one of my motorbikes at around 45mph and have still not been able to pinpoint the cause! I have tried holding the bars very loosely and I can feel the wobble just beginning to build up. Needless to say, I don't take both hands off the bars at the same time any more!
On motorbikes,
bar end weights and
steering dampers are sometimes fitted in an attempt to eliminate this wobble.
Alan