23rd February 2016 - Bike Quick Release Skewer Conical Springs
What are they for?
They help to centralise the skewer when you're fitting a wheel.
Do I need them?
No (but it's easier to fit a wheel with them on).
What can you do wrong?
Get the springs the wrong way round (see bottom picture).
Why is this bad?
Because your wheel will not centre properly in your bike frame - this could result in your wheel rubbing on your frame or your brakes not working properly.