So you're thinking about riding the Trans Cambrian Way as an ITT. You've seen the stuff on the internet about people riding it over 2, 3 or even more days. Many of them stayed in B&B, perhaps they had leisurely lunch stops and their longest day was probably around 40 miles, your experience is going to be a little different ... here's a bit of what you can expect.
Plenty of slightly overgrown double track
Trails tough enough to damage your bike!
Lots of heather ...
and the odd tricky bit!