There are two options for Gates Belt Drive and Large Chain Adapter for Patterson Transmission crankset:
1.) Higher Gearing: We Provide the Adapter Spider with 130 mm BC for mounting Gates Pulleys and larger Chain Rings.
This Gates Belt Drive Adapter Spider fits Gates Belt Drive Pulleys and larger Chain Rings – Standard five hole pattern.
Installation Link: Chain line chart for mounting the spider adapter
2.) Lower Gearing: 39T Gates Carbon Drive Centertrack Belt Ring for Patterson Transmission Crankset
Purchase at Ti Cycles of Portland: This Gates Pulley mounts directly to the Patterson Transmission Crankset: Click Here for More Info