I bought a motobecane a month ago. It runs great but I got a flat tire and decided to buy a new tube. I looked on the tire and it said 2.25 x 17 so I ordered this size tube.
Then I went to change it and the tube inside was a 1.75 x 20.
So my question is, is it straight forward that what's on the tire is the correct size tube and you can get away with different size tubes? Or is the size of the tire 2.25x17 but the tube should be a bigger size compared to the tire?
I know this is basic but I'm new to this.