| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:40.56 | 2025 Alan Swanston Classic | 2025-12-05 |
| 100m Breaststroke | 1:52.45 | Winter Swimfest 2026 | 2026-01-24 |
| 100m Butterfly | 1:35.78 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Freestyle | 1:26.08 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m IM | 1:33.13 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Breaststroke | 4:01.98 | 2025 BTSC Trojan Cup | 2025-12-12 |
| 200m Freestyle | 3:08.05 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m IM | 3:32.14 | 2025 BTSC Trojan Cup | 2025-12-12 |
| 50m Backstroke | 49.78 | PICK Last Gasp 2025 | 2025-06-07 |
| 50m Breaststroke | 50.35 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Butterfly | 40.94 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Freestyle | 40.23 | 2025 Alan Swanston Classic | 2025-12-05 |
Cheng, Miles's top personal bests include 100m Backstroke (1:40.56), 100m Breaststroke (1:52.45), 100m Butterfly (1:35.78), 100m Freestyle (1:26.08), 100m IM (1:33.13).
Cheng, Miles swims for Newmarket Stingrays Swim Club.
Cheng, Miles has competed in 7 meets.