i found a shop that sells the 140/70/17 BT45s much cheaper than the 130....will these tires affect the shape in a negative way?...pinch too much?...too round that it'll wear off the center too fast???
they will do just fine 150 are the ones that pinch
You definitely will wear the center faster, and you won't get chicken strips worth "aaah" and "ooohhh", but since people use 150ies and even 160ies in the original rim I foresee that these effects will be light.