I’ve got some Schwalbe Pro Ones in 25mm. Now I know they’re partly rim width dependant, but they’re probably as wide as the 28mm Conti GP4S I have on the other bike. Massive!
They needed some decent tyre levers to get on, but not as hard as people on here sound as though they’ve experienced. Mine inflated super easy but seemed to have a few pin holes from new which needed the sealant to stop the leakage. A bit of a shake and it was sorted. Hope this wasn’t because they were duffers that I got from Taiwan! But they haven’t seeped air since, and need less topping up than normal tyres/tubes.
I always carry tyre levers and would just carry spare tube(s). Wouldn’t bother carrying sealant or tyre boots – why would you carry any more than you would with normal tyres??
On the road they roll nicely, but anything feels better and faster than the winter bike. To the touch though, they do feel like a different compound to other brands of tyre I have (which all seem similar), again I hope its not because I’m riding fakes from Taiwan!