Garmin
Instinct E 45mm vs Street X
Device summary
Polar
Street X
Full specifications
| Basic information | ||
|---|---|---|
| Release year | 2025 | 2026 |
| Starting price | — | $250 |
| Display size | 1.2-inch | 1.3-inch |
| Dimensions | 45.0 mm × 45.0 mm × 14.2 mm | 45.0 mm × 45.0 mm × 13.8 mm |
| Weight | 48 g | 28 g |
| Front material | — | Corning Gorilla Glass 3 |
| Back material | — | Bio-based plastic |
| Display | ||
| Display technology | MIP | AMOLED |
| Resolution | 176 × 176 | 416 × 416 |
| Protection | — | Corning Gorilla Glass 3 (AF + DLC coating) |
| Performance | ||
| Expandable storage | — | No |
| Battery & charging | ||
| Charging standard | Garmin proprietary clip / USB charging | Proprietary / USB-C. Smartwatch mode up to 10 days; performance training (GPS + HR) up to 43 h; eco training up to 170 h (power-save — not everyday life). Complete watch 48 g with wristband; body 28 g without. On-device storage 32 MB |
| Battery type | Lithium-ion | Li-Pol (385 mAh) |
| Connectivity | ||
| Cellular | GPS / multi-GNSS | GPS / Galileo / BeiDou / QZSS (single-frequency; no dual-frequency GNSS), Route guidance; compass; barometer, Precision Prime™ OHR GEN 3.5; skin temp GEN 1 (no ECG / SpO2 / Elixir suite), Integrated LED flashlight (white / red), Polar Flow |
| Bluetooth | Bluetooth | Bluetooth® LE |
| NFC | Yes | — |
| Build & durability | ||
| Frame | Fiber-reinforced polymer | Bio-based plastic (PA11+8GF); aluminum; stainless steel |
| Ingress protection | 10 ATM | WR50 (50 m); MIL-STD-810H |
Basic information
Release year
- Instinct E 45mm
- 2025
- Street X
- 2026
Starting price
- Instinct E 45mm
- —
- Street X
- $250
Display size
- Instinct E 45mm
- 1.2-inch
- Street X
- 1.3-inch
Dimensions
- Instinct E 45mm
- 45.0 mm × 45.0 mm × 14.2 mm
- Street X
- 45.0 mm × 45.0 mm × 13.8 mm
Weight
- Instinct E 45mm
- 48 g
- Street X
- 28 g
Front material
- Instinct E 45mm
- —
- Street X
- Corning Gorilla Glass 3
Back material
- Instinct E 45mm
- —
- Street X
- Bio-based plastic
Display
Display technology
- Instinct E 45mm
- MIP
- Street X
- AMOLED
Resolution
- Instinct E 45mm
- 176 × 176
- Street X
- 416 × 416
Protection
- Instinct E 45mm
- —
- Street X
- Corning Gorilla Glass 3 (AF + DLC coating)
Performance
Expandable storage
- Instinct E 45mm
- —
- Street X
- No
Battery & charging
Charging standard
- Instinct E 45mm
- Garmin proprietary clip / USB charging
- Street X
- Proprietary / USB-C. Smartwatch mode up to 10 days; performance training (GPS + HR) up to 43 h; eco training up to 170 h (power-save — not everyday life). Complete watch 48 g with wristband; body 28 g without. On-device storage 32 MB
Battery type
- Instinct E 45mm
- Lithium-ion
- Street X
- Li-Pol (385 mAh)
Connectivity
Cellular
- Instinct E 45mm
- GPS / multi-GNSS
- Street X
- GPS / Galileo / BeiDou / QZSS (single-frequency; no dual-frequency GNSS), Route guidance; compass; barometer, Precision Prime™ OHR GEN 3.5; skin temp GEN 1 (no ECG / SpO2 / Elixir suite), Integrated LED flashlight (white / red), Polar Flow
Bluetooth
- Instinct E 45mm
- Bluetooth
- Street X
- Bluetooth® LE
NFC
- Instinct E 45mm
- Yes
- Street X
- —
Build & durability
Frame
- Instinct E 45mm
- Fiber-reinforced polymer
- Street X
- Bio-based plastic (PA11+8GF); aluminum; stainless steel
Ingress protection
- Instinct E 45mm
- 10 ATM
- Street X
- WR50 (50 m); MIL-STD-810H
Key differences
The most meaningful measured gaps in size and weight — not an overall winner.
Weight
Street X
20 g lighter
Thickness
Street X
0.4 mm thinner · minor difference
Height
Very similar height
Width
Very similar width