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I just received a new 5700 hub, and it says Malaysia on it instead of Japan like the 5600 hubs. based on the techdocs, most of the parts are identical to 6700, but I guess the remaining parts and probably also assembly come from Malaysia. I also noticed that the rear hub flange spacing is slightly less than Ultegra 6700. I didn't measure it yet, but it looks like 2mm. Shimano's cheatsheet shows the measurements to be identical with 5600 and 6700... I'm assuming the move to Malaysia is how the 5700 groupset costs less than 5600. I'm not in a position to discuss quality/durability. The hub looks nice, but I didn't ride with it or build a wheel with it yet. It weighs the same as a 6700 hub I just weighed.