Term
Center of gravity (COG)
“Center of gravity” is how the chair’s rear wheel position lines up with the user’s balance point. It strongly affects how easy the chair is to push and how stable it feels.
Small adjustments can make a big difference. Changes should be made cautiously.
In simple terms
Think of COG like where the chair “catches” you. If the rear wheels are more forward under you, the chair often feels lighter to push — but also easier to tip backward.
What it affects
- Efficiency (how hard you have to push)
- Stability (especially backward tipping risk)
- How easily you can “pop” casters over small obstacles
- Confidence on slopes/ramps
- How the chair feels during quick movements
Common tradeoffs
- More forward COG: easier propulsion and maneuvering, but increased tip risk and less forgiveness.
- More rearward COG: more stable and beginner-friendly, but can feel heavier/slower.
For many people, the best approach is: start stable → build skills → fine-tune toward efficiency.