Lately a new wheel size has been gettting a bit of press. 27.5+ and 29+ are the traditional 27.5 and 29 inch wheels with a bit of a twist. They are wider than the traditional wheel. They are 3" or so rather than the usual 2.1-2.2ish.
A few examples:
Rocky Mountain Sherpa
There are others out there as well, but some of the mainstream players are onboard with the trend.
What do you think? Another tire size good? Will it make the current trend of 26" fatbikes obsolete? Is it a complete marketing scam?