I'm curious if anyone ~6'4" can comment on the fit of the biktrix juggernaut bikes. Their frame size comes in an 18.5" as the larger size and fits 5'8" and taller riders. While I currently favor many aspects of biktrix bikes, not the least of which is the loyal customer base who seems pleased with help on any issues they run into, I am having a hard time believing I would fit comfortably on a bike that also fits comfortably for someone 8" shorter than me. There are other bikes like the M2S that come in a 21" frame, but the limited posts by customers regarding their experience post-sale are less than desirable, and it is unclear when this will actually be restocked. I hope to use whatever bike I get in low PAS mode and get a good workout in on longer rides, so fit seems important.