i've got an older kryptonite nyc chain. i bought it about five years ago.

it's about 48" long, the links are more silver in color, have rougher welds, and each link is 2.5" long.

all my friends have newer chains which are about 36" long (i like that my longer chain can get around a pole and through through both my wheels), are gold in color, have smoothed out welds, and each link is 2" long.

i assume krypto just started using chains with a more refined spec and that mine is just as strong (right?), but why the change in link size and length?