underneath the metal bands which tighten onto the bars are black plastic covers with a wedge fit, prise these out and inspect the state of the grease on the inner mechanism.
there are youtube tutorials if you need to disassemble in order to replace springs/ratchets/grease
underneath the metal bands which tighten onto the bars are black plastic covers with a wedge fit, prise these out and inspect the state of the grease on the inner mechanism.
there are youtube tutorials if you need to disassemble in order to replace springs/ratchets/grease