Roll add‑on is how much your ball keeps rolling after it lands.
Simple way to pick a number:
- Soft/wet course: try 0–5%
- Normal fairways: try 5–10%
- Firm/dry course: try 10–20%
Tip: If you know Carry and Total for a shot, roll% ≈ ((Total − Carry) ÷ Carry) × 100