re suspension forks, the bike is designed for rigid forks and as such it would be pretty hard to find a pair that would preserve th geometry, the great thing about rigid bikes is that the geometry doesn’t alter at all and once you dial into that you can really become one with the way it handles. Secondly, most suspension corrected frames will have downtube clearance, this doesn’t. Having said all this, one of my customers fitted a pair of Reba’s with a longer lower headset cup and reports that it works very well.
The Stooge geometry is designed for slightly larger diameter front wheel, ie 29+. The rear is designed for a 29 x 2.3 rear tyre, 27.5 x 2.8 also fit, both of which will preserve the geometry. regular 29er tyres will work front and back but the handling sharpens up a little, though not in a bad way at all.