I'm confused... Why would a manufacturer have a better technology and choose not to use it just because its intended for a road bike? It would seem that if a better seal is available, then Shimano or who ever else would would price similar models of hubs with similar seals. But I'm not a designer or engineer.
It would seem that since most mt bike hubs are now made disk compatable that any advantage in dish would be offset by the disk mount. I realize that getting a non-disk mount hub would eleminate the problem...
Scott