I recently decided to replace the rear wheel on my road bike since I couldn't disassemble the old Helicomatic freewheel
I now have a new rim, which oddly has slightly serrated sides (I'll add a picture tomorrow), while the original wheel was smooth. As a consequence, the rear brake doesn't create a lot of friction which I think is dangerous.
However, the seller insisted that the wheel was meant for rim brakes. Am I being lied to or what do I need to do to get proper brake grip on the rim?