Here is a 39 tooth HTD profile pulley, fitting any two 15 mm wide HTD timing belts. This is shipped as an un-assembled kit. The center bore accepts any flanged bearings with a 1.125 in. OD. It can also accept any of our legacy hubs listed here:
500EX Hex Hub am-2568 500EX Key Hub am-0976 625 Key Hub am-0214a 10 mm Key Hub am-0985a 10 mm DD Bore Hub am-2279 0.375 in. Hex Hub am-2231b