Also just how heavy are they?
heavy, best part of 6lb for the 19.5″
ETT for the 18 seems to be 620 which would be fine, lots of seatpost but I like that for comfort anyhow.
The On-One site geometry uses completely the wrong table. Use the one on PX, which is correct:-
http://www.planetx.co.uk/i/q/FROOSSLTD29/on-one-inbred-29er-single-speed-mountain-bike-frame-ltd-edition
(The on one site uses the wrong column headings, from L-R it should be 16, 18, 19.5, 21 – so it’s the 19.5 which has the 619 ETT)
Plenty of clearance for mud etc….
Toying with the idea of one of these instead of my Cotic Simple SS
Is your simple a 29er? If so, why on earth are you considering the Inbred?! The Simple is a much nicer frame. If you can find a Scandal 29er either V1 or V2, they ride lovely 🙂