Yup. I recently put a set on an ABG and had a hard time stringing them up due to the bare core wire. Funny enough, a fully wound E string would have fit into my Martin's tuner just fine.

The exposed core took a little bit of effort to get wound around the post evenly. Also, they look a little strange with two strings having just the core wrapped on the tuner while the other two strings look like normal.
They are terrific sounding and feeling strings, though! I will definitely buy another set for that bass.
