DaveColburn

I know I am late posting this, but here is my take on this topic. 650B is being pushed by some in the industry looking to gain a foothold. If you are a niche brand, it is hard to break through with either 26" or 29" product. The 650B/ 27.5" market is not crowded, yet. The problem for all riders is that adding another tire size will either reduce the options available in the current wheel size(s), or drive up prices, or most likely some of both. More engineering costs, more tire molds, more inventory costs, etc all gets passed on to all of us. People should ride what they like, not what they are told to ride. Having been in the industry for over 30 years, I have seen too many people turned off from cycling by the snobs who belittle whatever you choose/can afford to ride. It should be about riding, not buying,bikes. I personally hope 650B goes away. 26 and 29 are enough.

It may have already been mentioned, but derailleur hangers can creak. Usually just tightening the bolt(s) is sufficient. In extreme cases, using blue locktite to fill in the gaps between the hanger and the frame can help.

Aero spokes on road bikes are especially prone to creaking and it sounds like it is coming from the frame.