It appears that they would fit but I would like to be certain. At this point my R20 is stock but the rear wheel has been changed out with one rated for 35 psi and the front one is stock but not in that good of condition.
Also, I am 5'-9" and the seat height would be better if I could go higher but I am at MFR's limit but even a half inch would be a big difference. I know I can get mountain bike seat post that is longer but then I have to change my seat for a single rail.
I like the Stock stem and tube but might like more height so higher handlebars may be in order.
But I am digressing. Tires first.