Willow Chainring - Tripleizer - 130/135 bcd options.
Tripleizer ring. Mounts on the inner position of a double crankset and allows a 74 bcd chainring to be mounted on the inner chainring, allowing a double->triple conversion.
Includes hardware for mounting 74 bcd ring.
74 bcd ring not included, but there are several choices available here: http://treetop.bigcartel.com/product/willow-chainring-74-bcd-25t-32t-options