Review on Wheels Manufacturing Dropout 65 Derailleur Hanger by Philip Lindsey

Well made product, I was impressed. Works well instead of the factory hanger and is cheaper. A factory derailleur hanger is more expensive, but it's just cast aluminum. My only concern is that due to its mechanical construction, this product may not shear as easily as a factory hanger. This can make it easier to damage your switch, but the increased durability can be seen as a good thing. Again this is a guess, it could very well be designed to shear on impact and protect your derailleur.