Wheel size

[SavageFrog]

Hey guys,

Im new to this forum but not new to keeping hamsters- I've had a few hamsters in my life- right now I have 1

So I have a female robo hamster who is over 1 year old, she lives in the Riviera Varazze cage- 70x40x40 cm, (please visit amazon for pictures- I'm unable to post links as I have a low number of topics/posts)

and she has a flying saucer I think its called- correct me if Im wrong, she has the middle size of the wheel - not sure what that is exactly but its not the smallest one

However there are some issues with the wheel where sometimes she ends up being 2/3 days without a wheel which makes me (and probably her) very annoyed. So I decided to change the wheel to a silent spinner, but I'm not sure what size I need.

Any recommendations on the size? And is it actually quiet? Will the required size fit in my cage?

Thank you