Cal. Veh. Code § 22409
No person shall operate any vehicle equipped with any solid tire when such vehicle has a gross weight as set forth in the following table at any speed in excess of the speed set forth opposite such gross weight:
| When gross weight | Maximum speed |
| of vehicle and | in miles |
| load is: | per hour: |
| 10,000 lbs. or more but less than 16,000 lbs. | 25 |
| 16,000 lbs. or more but less than 22,000 lbs. | 15 |
| 22,000 lbs. or more | 12 |