I probably wouldn't put much if any money towards a 1 or 2 but likely you can fit certain 2.0 tires I have 650bx50 tires on my Vado which is basically the electric version. However I would check with Specialized just to double confirm and note certain knobbier tires may not fit. I would get a Sirrus X 4.0 which will get you thru-axles so you have more wheel selection as most modern wheels for 650b are going to be thru-axle compatible plus you will get a much nicer bike more suitable for commuting and daily driving. Plus if you decide to upgrade down the road you could likely swap wheels with your new bike vs. the quick releases on the lower end models.