KMC Half Link 1/8"

If you are having trouble fitting the desired gears onto a bike with
vertical dropouts, this link will let you add or subtract 1/2 a link (1/2 inch) from your chain,
allowing you to move the axle 1/4" forward or backward. Different brands of chain have
different diameter rivets; these links do not fit all 1/8" chains, but they do fit the models we sell.