| Model |
FMX 242 |
FMX 272 |
FMX 312 |
FMX 482 |
FMX 542 |
FMX 622 |
| Capacity (lbs.) |
24,000 |
27,000 |
31,000 |
48,000 |
54,000 |
62,000 |
| Installed Weight1 (lbs.) |
550 |
658 |
665 |
1,090 |
1,305 |
1320 |
| Axle Configuration |
Single |
Single |
Single |
Tandem |
Tandem |
Tandem |
| Axle Travel2 (in.) |
8 |
8 |
8 |
8 |
8 |
8 |
| Ground Clearance3 (in.) |
10.75 |
10.5 |
10.5 |
10.75 |
10.5 |
10.5 |
| Ride Heights4 (in.) |
8.5 to 15.5 |
8.5 to 12.5 |
8.5,10,13 |
8.5 to 15.5 |
8.5 to 12.5 |
8.5,10,13 |
| Axle Spacing (in.) |
N/A |
N/A |
N/A |
52 to 72.5 |
54 to 72.5 |
54 to 72.5 |
| Disk Brake Compatibility |
Yes |
Yes |
No |
Yes |
Yes |
No |
- FIREMAAX® EX capacity ratings apply to fire and rescue market only
- FIREMAAX EX may be referred to as PRIMAAX® EX by some OEMs
- Refer to Hendrickson's technical literature for complete operating details
- All applications must comply with applicable Hendrickson specifications and must also be approved by the respective vehicle manufacturer with the vehicle in its original, as-built configuration. Contact Hendrickson and the respective vehicle manufacturer for approval of additional applications
- For additional details regarding specifications, applications, capacities, operating, service and maintenance instructions, refer to applicable Hendrickson technical literature or contact Hendrickson at 630-910-2800
1. Installed weight includes complete suspension, torque rods, axle and frame brackets and all hardware. Published weight is based on a standard FIREMAAX EX suspension compatible with drum brakes using 10.0-inch ride height. Other configurations may vary.
2. Axle travel may be limited by vehicle manufacturer; axle stop settings and shock stroke may restrict suspension's articulation. Varying ride heights and configurations may restrict travel.
3. Ground clearance is based on a standard FIREMAAX EX suspension with 11R22.5 tire size.
4. For different ride height options, please contact Hendrickson (630-910-2800), your truck manufacturer or your dealer.