frame size

I am confused. I know they have sizing ranges for French/presta tubes but do not for other tubes. Why is that? Also, I ordered a bike tube that was advertised as 650 x 23c/26c. What I received was a 650 x 25c. It doesn’t state that it is compatible with sizing ranges. Will this work for my 650...

Hallo, I have some difficulty deciding what frame size to choose. The manufacturer table seems to suggest size L but it is very close, size M might be more fitting. Could you be so kind and help me choose the correct size? My height is 179cm My step length is 81/82 cm arm length is 61cm The...