Chinese hamsters are quite a bit smaller than dwarf hamsters, at least from what I've seen. I've had Jinx for about 2 months now but I don't know how old she was when I got her (I bought her from a pet store) so she could already be grown for all I know
For some scale, Jinx is roughly the size of a mouse, so pretty small. When she got on the wheel (Kaytee's 6in silent spinner) she can't even get it to move and it is brand new. There were 4in wheels at the store I was at that were recommended for mice and hamsters but I had heard that you should size up for the hamster's benefit so as not to strain their backs. I think perhaps the problem is that she is just so light and the wheel is much heavier than her.
I may try some veggie oil though, that might help it along. Thank you for the advice.