I couldn't find anything showing what a swapout dropout frame looks like - but here is a close up of the dropouts on the frame I am considering.
UPDATE: I asked the guys at Planet-X/On-One and they confirmed that the frame, "is a singlespeed specific frame, so isn't compatible with the swapout system unfortunately. It's cantilever only, so won't accept disc brakes."
Size wise I ride a 54/M in road bikes, which I believe translates as a medium (18"). I think the 29er on the 'bay is a 19" - but I'll take a look. I have some left over components (and 26" disc wheelset) from an old mtb which I could re-use - so looking at 26" based frame at the moment
I couldn't find anything showing what a swapout dropout frame looks like - but here is a close up of the dropouts on the frame I am considering.
UPDATE: I asked the guys at Planet-X/On-One and they confirmed that the frame, "is a singlespeed specific frame, so isn't compatible with the swapout system unfortunately. It's cantilever only, so won't accept disc brakes."