Originally Posted by
louky
BTW, is there a good way to measure the axle width on these wheels without a special tool while I am at the co-op?
Also, should I be calling this particular one a freehub or a freewheel?
Your original wheel is a freehub
You need to measure the hub "OLD" not the axle, but a QR axle needs to fit within the dropout. If an axle on a QR wheel extends beyond the dropout it will not clamp correctly. Axles can be cut shorter if too long.
Measuring the OLD on a built wheel can be done with a decent ruler and a good eye. The standard dimensions are 120mm, 126, 130, 135 and some longer others for more modern and tandem frames. Eyeballing with a ruler is usually good enough to determine which it is.