Well, it is a bicycle race, so i want to be able to pedal. I have a 26" front wheel and a 20" back wheel, as you can see in earlier pics. The geometry is most definitely screwed up and i had to go to 145mm pedals to not be scraping my pedals on the ground. Double 20" rims would make the pedals excellent kickstands..
I think the reality with this frame is that the bottom bracket may be an inch lower than most. I pedal scrape on my other Trek ( same generation, slightly larger frame. ), with a stock fork height and a crank length that is only 5mm taller than what came on it stock.
I am 6ft tall with longer legs, so a BMX setup doesn't work too well.
Folding bikes seem to unstable, tried a bunch of those.
I found two people locally who can fabricate for some $, but they are not too serious about this.
The genesis v2100 bike i own with the farfle swingarm seems to also be a pedal scraper if you go 20" wheels.
Still living in an apartment, but have dreams of owning a house with a garage where i can work with metal, weld and such; put together these awesome custom frames that everyone is making here on the forums.
Until then i am a bit limited on what is possible.
So 26" sounds good, but an extra half inch of raise in the rear should help quite a bit.
Next week i go to Utah to visit salt lake city. There is a KMX dealer out there. I'm taking my big car out there with the lady, in case i fall in love with one, scrap this build, and put a pie on the back.. till then, this build is definitely in flux!!
All i know is that i'm not too happy with the stability/handling of this bike.