TransDev hold a large stock of imperial timing pulleys in pilot bore type and taper lock bush type. There is a stock range of the small MXL pulleys in injection moulded Plastic, with different bore styles. There are also Aluminium smaller pulleys MXL and XL pitch. The bulk of the medium sized stock is in Steel, with the larger sizes in Cast iron; see the individual pages for specific materials and dimensions. Not only the Rubber timing belts, but also the Polyurethane imperial pitch range of belts, are designed to run on these pulleys.