The weight of each JCB Fastrac varies on the model, but the below table provides a guide.
| Model | 4160, 4190 & 4220 | 8290 & 8330 | ||||
| Part | Front Axle | Rear Axle | Total | Front Axle | Rear Axle | Total |
| Base Machine | 3,845 | 3,730 | 7,575 | 5,920 | 5,330 | 11,250 |
| +600/70 R30, front link and front PTO | 4,870 | 4,370 | 9,240 | 6,420 | 6,150 | 12,570 |
| Maximum permissible mass | 8,000 | 10,000 | 14,500 | 9,000 | 11,500 | 18,000 |
For full specification on every JCB Fastrac model, download the dedicated 4000 and 8000 series brochures here.