I can't stand this 27.5+ and 29+ it's not new and it's been around years ago with 3inch tyres so I'm doing myown take on it. Mini Fat Bike time with 24 by 3 inch tyres and single speed. I now have my winter bike.
Lots still to do incluiding measuring to see if 3 inch tyres will fit, new rear wheel, stem, put the Hpe headset from the other frame on and need to find a tool to remove the BB to name the bigger jobs.