I see what's up now. First time thinking about fat bike dimensions.
So you run a second wheelset, in my case 27.5s.
Is it a pita to build a fat bike hub onto that rim size? In this case 135 front 170 rear or can you buy stock rims in that size?
I've read a lot about how hinky the V rubber mission tires are and plan to get JJ's down the road. To me I'm just buying a platform to build up from as I have a lot of upgrade parts and donor bikes to draw from.
A 6061 frame and standard non proprietary fittings is a good base when one cannot afford to plop 2K+ to see if one likes the genre. One bike I'm looking at has already had hydro disc and a suspension fork added while the other is near new and at a good discount.