420/85R28 Firestone R1085 – tyre pressure and load table
- Size
- 420/85R28
- Load index
- 139A8/136B
- Overall diameter
- 1420 mm
- Section width
- 430 mm
- Rolling circumference
- 4290 mm
- Recommended rim
- DW15L
Load and pressure table (kg per tyre)
| km/h \ bar | 0.6 | 0.8 | 1 | 1.2 | 1.4 | 1.6 |
|---|---|---|---|---|---|---|
| 10 | – | 2290 | 2500 | 2740 | 2960 | 3160 |
| 30 | 1520 | 1755 | 1965 | 2190 | 2400 | 2600 |
| 40 | 1490 | 1720 | 1925 | 2105 | 2275 | 2430 |
| 50 | – | – | 1690 | 1885 | 2070 | 2240 |
Source: Firestone AG Technical Brochure 2022 (EN, PDF 2026-03), p. 64. Values are taken from the manufacturer's published table and may be outdated or wrongly transcribed. Always check the manufacturer's current documentation and the vehicle manual before setting tyre pressure.
Open in the Däcktryck.se appMore Firestone R1085
- 250/85R24 109A8/106B
- 280/85R24 115A8/112B
- 280/85R28 118A8/115B
- 320/85R24 122A8/119B
- 320/85R28 124A8/121B
- 340/85R24 125A8/122B
- 340/85R28 127A8/124B
- 340/85R38 133A8/130B
- 380/85R24 131A8/128B
- 380/85R28 133A8/130B
- 420/85R24 137A8/134B
- 420/85R30 140A8/137B