I’ve only ever run flats on the MTB, regardless of what I’m doing. I’m not convinced that spuds would particularly offer me any benefit over flats as I prefer to be able to get my feet down instinctively as and when necessary and I’m a big ring masher when riding eyeballs out anyway.
There’s 4 stiff climbs on the route, 2 of which are Tarmac, 1 is up the hard-pack track through Hardcastle Crags and the other from Pecket Well to Midgley Moor I’ll probably be walking up anyway. The boggy field to the House of Shit and Midgley Moor are bloop-fests and will involve at least some walking unless the weather takes a dramatic turn for the warmer and drier this week. Spuds will make no difference to me across any of that.
I’ll be running 1.9 Black Jacks at 65psi to take advantage of all the hard pack and Tarmac, which makes up the vast majority of the route. Mud tyres will be an advantage for about 5% I reckon. I play the percentages, bust my nuts on hard ground and then live with my best attempt at the tricky bits. Just my approach and not everyone’s cup of tea I know.
I suppose it all comes down to whether your priority is chasing the clock or whether you’re happy to enjoy the ride in whatever time it takes you.