Well done Peanuts on getting through wet tail, a little warrior. He's gorgeous!
Yeah those comfort wheels can be seriously noisy, probably get a silent one. They do have wodent wheels (27cm) on rodipet that deliver to the UK (£3.50 delivery so not that expensive) but you'd be better off with a silent runner.
https://sugarglidershop.co.uk/produc...nner-12-wheel/
More silent than a wodent wheel and better made. You'll want a 11-12" wheel for a Syrian regardless of which one you choose.
Edit - If the large trixie wheel didn't fit was that because of the height? What cage is he in?