I’m willing to bet that most disc brake hose compression nuts out there are not getting torqued properly. Even if you have a crowfoot adapter, using it is more complicated than simply setting the specified torque on your torque wrench. That’s exactly why Magura designed their new Sleeve Nut Bit Adapter–a tool that anyone who works on disc brakes will want to own.
The idea is simple enough when you see it, and will make you wonder why it hasn’t been done before. To our knowledge, the Magura tool is the first of its kind and consists of an extra-long 8mm socket with a full-length slot in one side. That slot allows you to slip the socket around the brake hose, and properly tighten the compression nut.
While it was developed for use on Magura brakes, the 8mm size should work with most disc brake brands. So far, it’s been the right size for everything we’ve tried.
When used with the Magura Torque Control torque wrench (which was developed in part with Snap-On tools), there’s no crowfoot adapter required. The CDI torque wrench has a torque-limiting cam-over clutch which can be set from 2-8 Nm. In addition to the brake compression nut use, the torque wrench includes six other bits for use on any other components with low torque specifications.