Hi everyone, I am hoping for some knowledge! I would very much appreciate it!

Background: I am doing a major long-distance challenge for charity in a few weeks… I am not interested in going tubeless. I am getting a bit stuck on possibilities, not helped by being dyslexic and struggling with "dancing" numbers so getting a tad overwhelmed and would value ideas/recommendations/thoughts…

QUESTION 1 – Ultimate 3XS:

I want to utilise my road bike as a "backup bike" – it has very deep rims and currently has unsuitable tyres (I feel). As I will be riding across all sorts of terrain, I can't afford to feel anxious that my tyres won't stand up to it.

The basic data: my wheel size is 27.5", and my wheels are DT Swiss ARC 1600 Dicut 50mm; currently, they have Schwalbe Pro One TLE (25mm).

Fork tyre clearance = 31MM. Frame tyre clearance = 32MM

I love my Schwalbe G-One tyres and would like to know if these wheels would take them. I am aware of Conti's GP5000, but they're out of budget, and I have been extremely happy with Schwalbe for years.

QUESTION 2 – Grail 2XS:

I found this packet in the back of my cupboard (see packet pic), but I'm unsure if this is actually a spare inner tube for my other bike, Grail (which has 27.5" wheels, 650s) with Schwalbe G-One Pros on it. I need an extra spare inner tube – is this the correct one?

(I stupidly forgot to mark the packet clearly with which bike this was for when I bought it!)