Our customer wanted to run an XD driver on his Hadley hubs that were made a few years ago. The rear hub needed a narrower axle to accommodate the XD driver, so we had to replace the axle as well. Hadley is a very small operation based in California, and it is amazing that they produce parts to update older hubs so they can accept the newest drivetrain goodies!! Just check out the machining on these parts! Woah!! That XD driver is titanium btw;)