Hi all,

I've noticed that something is a bit off in the rear disc brake assembly on my MTB.
Can't tell with certainty if it's frame, the hub, or possibly the adapter. Either way, the adjustment allowed by the caliper isn't enough to get the pads to entirely clear the rotor. It appears that the rotor is sitting too far inboard. Got it (temporarily I hope) sorted by cutting some washers out of sheet metal and sticking them between frame and adapter.
But by trying out another wheel I suspect that it's the hub that's out of spec, so I'd prefer to shim the rotor outwards rather than the caliper inwards to maintain cross-compatibility with other wheels/bikes.
And I'm not entirely happy with the sheet metal shims I bodged together either, a little too thick, and galvanized....

Are there any ready-made shims in various thicknesses available to go under the rotor and around the M6 rotor mount screws available?