I've just bought a new (Planet X) Holdsworth Stelvio (http://www.planetx.co.uk/i/q/CBHOLSTELTIAG/holdsworth-stelvio-shimano-tiagra-4700-touring-adventure-bike) and am having a problem with the front disc brake rotor being too close to the brake mount/adapter.
The lower bolt & washers holding the caliper to the adapter are less than 1mm away from the rotor and the caliper is adjusted fully outwards (away from the rotor) at this point. On spinning the wheel there is no contact, but whilst riding and putting any pressure through the frame there is nearly always contact between the rotor and the washer/adapter.
Note: next two images with bike upside down
The brakes are Avid BB5s as come standard on the Tiagra build of the Stelvio.
So far I've tried: - tightening the bolts holding the adapter to the fork, - adjusting the caliper position (though there is little movement since the rotor is too close), - wheel is correctly seated in the fork, - checking the truing of the rotor - it is true (brand new rotor).
I can only think that there might be an issue with the hub, somehow placing the rotor too far out on the left hand side? So far, the manufacturer have been helpful, but have only suggested things I have already tried.