I`ve been doing these now and again for some guys, ( intensely time consuming! ) its basically the same conversion as the regular tall spindle but it does use various hubs depending on what your doing. We can use the stock 5×5 hub which will give you the 3.06 register (all rotors will need to be bored to this, the 5×5 pattern will also need to be drilled into the rotor along side the stock one.) I have also done a HD spindle conversion using the std tall spindle hub using a conversion inner bearing (5 x4.75 and 2.78 register) so we can mix and match to suit for this one. Look for the listing soon.