er6n ima 4.5 zadnju felnu.
The 4.5 rim will fit a 150-160 just fine without problems. A 170 is too much. The deformation of the tire is highest towards the edges, or in your lean. The difference in the curvature in the center of the tire is minimal, but still there. I'm gonna post a pic from previous in this thread again for a quick visual. This doesn't show the in between sizes, but you can see how the deformation changes in severity as you get closer to the edges of the rim.
The tire is higher profile than nessasary because it's pushed up.
The overall curvature is more severe.
The curvature greatly increases as you near the edge
The edges are curled over at an angle the bike would never be able to use.
Tire "left over" at the edge your bike can't possible put on the ground ever, even sliding down the road on it's side does you no good!
The more curvature, the less the tire contact patch = less traction in turning, braking, and acceleration.