Thank you all.
Current maddux wheel has 11-34 10 speed cassette and a plastic dish guard. So I think we are saying 11s cassette should fit?
I am planning to go 44t front and 11-51 rear using Deore M5100 kit, I use the bike for commuting and fitness rides around my local reservoirs (hilly routes).
My wife says I should keep my money and stick with my current set up 🙂 (48/32). But she bought a Whyte Pimlico recently and I like her 1x set up with the 11-51, I’ve dropped my chain a couple of times changing front ring and it’s a bigger to extract from the frame. I’m a one handed cyclist and have a friction shifter next to the thumb shifter to control the front mech, the 1x set up has a lot of appeal for this bike (I wouldn’t go 1x on my road bike).