Which size wheel for Syrian?

[Black_Inky_Eyes]

Hi,

So, basically, I'm getting a Trixie wooden wheel however, I'm undecided between the 28 cm (11") and the 33cm (12" close to 13"). I'm going to be getting a Syrian and am therefore unsure of its size. I'm worried if I get a small Syrian then it won't be able to push the wheel around. I've always gone with the idea that I should just get the biggest size so it's fine if they grow out of it. But now I'm second guessing myself?

Any advice will be highly thanked!