Dan said:
I just got a new front wheel for my 1994 Gary Fisher Zebrano hybrid.
I was given back the "cap" end and the shaft with the lever on it (the
other end).
That's called a "quick release skewer" or "QR" for short.
Quoted message said:Also there was one spring coil (with a big end and small
end).
I notice on my back wheel that there is a spring on both ends of the
shaft and the bike frame (fork?) actually touches the coil and not the
shaft itself. I am guessing one of the springs got lost on the front
wheel.
What are these coils for?
They serve to hold the QR open, away from both fork tips, when the cam
(the lever) is in the open position.
Quoted message said:Are they necessary or can I go without them?
They are a convenience, not a necessity. They don't have any effect
on the safe functioning of the QR.
Quoted message said:Can I use just one of them on the front wheel and not suffer
any misalignment?
No, that would be a nuisance, with one side being held open and the
other side being held closed. Use both springs or none.
I advise you to take note of the proper way to tighten a quick
release. IT IS VERY IMPORTANT that you NOT try to tighten it like a
bolt, using the lever like a wrench. Instead, flip the lever to its
"open" position, and tighten the nut by hand until the lever begins to
tighten when it's sticking straight out, parallel to the skewer. Then
use force to fold the lever down to the "closed" position.
Here's an article on the topic:
http://www.bicyclinglife.com/HowTo/UseAQuickRelease.htm
Good luck, and ride safe!
Chalo