The upper wheel on my bandsaw is offset from the lower wheel by slightly over 1/4". I have adjusted the tracking so that the blade is centered on the upper wheel. But it is off-center on the lower wheel. When I put a long straight-edge across the upper wheel, the lower wheel is about 1/4" away from the straight-edge. The axes of the two wheels are pretty close to parallel when the blade is properly tensioned. I.e. the wheels are parallel but not coplanar.

Is this a common problem? Is there a good solution? I've used the saw this way for a long time and it works OK, but I have to believe it would cut a little smoother if the blade was centered on both wheels, and 1/4" seems like a lot of error.

(I was going to include a couple photos, but I get strange behavior from "manage attachments" when using an iPad. Is this a known issue?)

Thanks.