Most of our Timing Pulleys are now available with inch bore holes. Included are pulley types MXL, XL, L, H, S1M, S3M, S5M, S8M, T5, T10, AT5, and AT10. These new inch bores can be found on the same pages as the metric bore parts. Simply select "Inch Bore" from the drop down menu at the top of the CAD Configurator to configure a pulley with an Inch Bore.