whats the difference between 2 and 3 piece rims? I've been looking at some forged rims and with the 3 piece there is a big price difference. Anyone know why?

 

with 3 pieces, more build time and crazy offset options.

 

^ +1

2 piece wheels have a center disk and a 1 piece rim. the center piece and rim are either bolted on or welded on.

3 piece wheels have a center disk and a 2 piece rim (1 piece per rim half). the rim halves are conjoined then the center is bolted onto the rim halves. because of the variable widths in rim halves, offsets are more available.