Frame size is smaller than recommended I'm 191 cm tall and I want to buy UPTEN ZERO, the problem is the biggest frame size is "L" and is adapted for (173cm - 185cm) only, my question is it ok to ride a small bike? dose it effects me or what are the consequences?
Thank you
Is there a local bike shop near to you where you can go and try one for size and perhaps get advice?

I think, generally speaking, it's easier to get a slightly small frame to fit rather than trying to adapt a too big frame...