I noticed recently that my rear wheel is not balanced. By that I mean that one part of the wheel always 'drops' - put another way, if you imagine a given spoke, that spoke will typically end up in the same position if the wheel is at rest (off the ground).
If I lift the rear end of the bike up and make the wheel go really fast, the bike tends to 'shake' in my hand with the same frequency as the wheel's rotation. It's not that pronounced, but it's noticeable.
Before you assume it's the tube pin that's the cause of all this, it's not! The crazy part is that the wheel is actually heaviest on the *opposite* side. I experimented with counter-weighting the pin side of the wheel, and this indeed reduced the 'shaking'.
I went into my bike store down the street and the mechanic treated me like I was wasting his time. He didn't think it was an issue to be worried about, and it probably isn't. He also mentioned it might have something to do with counter-somethinged bearings. I asked him if he had something convenient to counter weight it with, but he wasn't helpful. I'm pretty sure a wheel that is not balanced wears out bearings prematurely. Am I nuts?
My question is really whether anyone knows if wheel makers purposely do this to counteract the tube pin. For reference, it's an Alexrims DA28.
If I lift the rear end of the bike up and make the wheel go really fast, the bike tends to 'shake' in my hand with the same frequency as the wheel's rotation. It's not that pronounced, but it's noticeable.
Before you assume it's the tube pin that's the cause of all this, it's not! The crazy part is that the wheel is actually heaviest on the *opposite* side. I experimented with counter-weighting the pin side of the wheel, and this indeed reduced the 'shaking'.
I went into my bike store down the street and the mechanic treated me like I was wasting his time. He didn't think it was an issue to be worried about, and it probably isn't. He also mentioned it might have something to do with counter-somethinged bearings. I asked him if he had something convenient to counter weight it with, but he wasn't helpful. I'm pretty sure a wheel that is not balanced wears out bearings prematurely. Am I nuts?
My question is really whether anyone knows if wheel makers purposely do this to counteract the tube pin. For reference, it's an Alexrims DA28.