- Knobs and protrusion rims have these protrusions on the outside of the rims for added grip
- Some wheelchair users like this because the knobs/protrusions provide something to grab and pull or push to move the wheels
- Many people who use protrusion or knob rims can switch to smooth rims very easily when they gain more strength
Recommended for:
- Most helpful for individuals with a weaker grip or less finger control to grip the average small rims
wheelchair advance 