Let's study the
GWR cycling by train brochure:
View attachment 730717
BUT!!
View attachment 730718
So that works out as a maximum tyre width of ~2.7" and a maximum rim diameter of ~20". I wonder if they meant "rim" rather than "tyre"? And if they meant "diameter" rather than "radius"? So it seems you're OK with a shopper fat bike but not a tourer.
Extra deep rims wont fit into the hanging up hooks, that's what that is on about, should say rim depth not diameter. so Fat bikes and 60mm aero wheel road bikes are out
So, I wish I read this thread even a day earlier.
I wish I took pictures, but the panic was on me as I tried to wrestle my bike back off the hook on the LNER Edinburgh to London train at Newcastle today.
I arrived nice and early and got myself lined up with carriage K to load the bike, and waited for the train to arrive. I was lucky enough to suss out the numbered hooks, and had loads of time to try and figure out how to hang both mine and Mrs Slicks bikes without causing any damage. A really nice foreign couple came at my back and started to load, which was fine but there isn't a lot of space in there to load both cupboards at the same time. I helped a few other passengers with heavy luggage and then went to my seat with Mrs Slick.
The issue started when that nice couple started unloading at Newcastle, meaning I couldn't get near my bikes until they gathered everything and left, then I'm sure you could see the colour drain from my face as I realised I couldn't get my bike back off the hook.
There was some more panic and drama before I realised I could just let some air out, which did the trick, but you just don't need the drama.
It probably says in the T&C's somewhere about the size, but given it took 3 months for someone to claim that nice wine, maybe restrictions like that should be highlighted.