Hmm, I know deore hubs use a 10mm allen key to undo the freehub?
Edit: Quick google Search reveals this...may be of some use
More Information
Halo Spin Doc. Freehub
– Halo Spin Doctor Freehub Replacement Guide-
· First step is to remove the push fit cones from the axle, just pull off and put to one side.
· On a hard surface, firmly tap the axle in a straight down motion to push out one of the bearings from the hub shell. I normally tap from the disc side first to remove the more difficult freehub bearing first.
· Turn hub over and repeat to extract bearing on other side of hub.
· With the hub shell free of axle and bearings, place an 11mm (or Imperial equivalent – 7/16”) in a bench vice. Do the vice up tight, it’s about to do a big job for you…
· Place the hub over the allen key, disc side down and lock in the freehub’s backnut. When in securely, turn wheel anti-clockwise. It WILL be tight, it WILL make a loud crack as the tension and threadlock is broken.
· With the backnut removed, turn the hub over and place freehub side down over allen key in vice. Repeat anti-clockwise motion with wheel to unthread freehub from hub shell. Expect effort and loud noises as before. Be sure to remove small spacer from hub also, it fits directly behind the freehub in the shell. The most common fitting error on these hubs is incorrect replacement of this spacer. DO NOT attempt to replace it over the backnut thread on the other side of the freehub.
· Have a good look inside the hub now you have the chance. Remove any grit, dirt or old grease and make sure everything looks good to go.
· Refitting Freehub. Re-assemble hub in reverse order to dis-assembly, take care with freehub spacer as mentioned before. Also, take care when re-fitting bearings, it’s not too tough, just be sure they go in straight…