Verified
Arizona Trailer Brake Laws 2026: Required Over 3,000 lb
Arizona statute states trailers or semitrailers with gross weight of 3,000 lb or more must have adequate brakes.
- Brake threshold
- 3,000lbgross weight
- Breakaway switch
- Required
- Safety chains
- Not required statewide
- Towing speed
- Special limit
- Double towing
- Not recorded
On this page8 sections
Quick answer: 3,000 lb gross weight
In Arizona, trailer brakes are currently listed at 3,000 lb (gross weight). Arizona measures gross weight, so weigh the trailer as you actually tow it.
Arizona trailer equipment rules
Breakaway switch
A trailer or semitrailer with a gross weight of 3,000 lb or more must have brakes designed and connected so that in case of an accidental breakaway of the towed vehicle the brakes are automatically applied.
- Applies when
- Trailer type and weight may matter
- Source
- A.R.S. 28-952(A)(3)
- Last checked
- 2026-08-21
Safety chains
There is no general safety-chain requirement for trailers. The statute only requires the drawbar or other connection to be strong enough to pull all weight towed and not exceed 15 feet. Tow dollies separately require two chains or cables.
- Applies when
- Conventional trailer couplings
- Last checked
- 2026-08-21
Speed / lane rule
A 65 mph cap applies to a combination with declared gross weight over 26,000 lb, or a vehicle drawing a pole trailer of 6,000 lb or more. Ordinary travel and utility trailers are not covered and follow the general limits.
- Applies when
- Posted roads and vehicle combinations
- Source
- A.R.S. 28-709(A)
- Last checked
- 2026-08-21
Double towing
Needs verification with Arizona vehicle length and combination rules.
- Applies when
- Multiple-trailer combinations
- Source
- Verified
- Last checked
- 2026-06-18
Read against the linked sources on . Statutes change and enforcement varies by trailer type — confirm before you tow.
Check your setup
How the 3,000 lb threshold applies to three trailers
Arizona measures gross weight, so the weight of the trailer as loaded is what counts.
| Example trailer | Weight checked | Against 3,000 lb |
|---|---|---|
| Small utility trailer | 1,650 lb | Under the Arizona threshold by 1,350 lb |
| Loaded just under the line | 2,900 lb | Inside the Arizona limit, but one heavy load away from crossing it |
| Mid-size travel trailer | 4,800 lb | Over the Arizona threshold by 1,800 lb — brakes required |
How Arizona compares with neighbouring states
2 of the 5 states bordering Arizona set a stricter brake threshold, so a trailer that is legal here may need brakes as soon as you cross the line. Equip for the strictest state on your route.
| Bordering state | Brake threshold | Compared with Arizona |
|---|---|---|
| California | 1,500 lb gross weight | 1,500 lb stricter |
| Colorado | 3,000 lb gross weight | Same threshold |
| Nevada | 1,500 lb gross weight | 1,500 lb stricter |
| New Mexico | 3,000 lb gross weight | Same threshold |
| Utah | verified stopping-distance performance rule | Different rule type — compare directly |
Planning a multi-state trip? The route brake law checker compares every state on a route at once.
Official source links
- A.R.S. 28-952 Required brake equipment legislature
- Arizona DOT dot
Arizona towing law FAQ
Are trailer brakes required in Arizona?
Arizona currently lists a trailer brake threshold at 3,000 lb gross weight. Always verify the official state source before towing.
What weight requires trailer brakes in Arizona?
The current data lists 3,000 lb gross weight as the brake threshold.
Is a breakaway switch required in Arizona?
A trailer or semitrailer with a gross weight of 3,000 lb or more must have brakes designed and connected so that in case of an accidental breakaway of the towed vehicle the brakes are automatically applied. (A.R.S. 28-952(A)(3))
Are safety chains required in Arizona?
There is no general safety-chain requirement for trailers. The statute only requires the drawbar or other connection to be strong enough to pull all weight towed and not exceed 15 feet. Tow dollies separately require two chains or cables. (A.R.S. 28-1108(A); 28-1095(G)(1))
Can I tow two trailers in Arizona?
Needs verification with Arizona vehicle length and combination rules.
Is there a towing speed limit in Arizona?
A 65 mph cap applies to a combination with declared gross weight over 26,000 lb, or a vehicle drawing a pole trailer of 6,000 lb or more. Ordinary travel and utility trailers are not covered and follow the general limits. (A.R.S. 28-709(A))
Does Arizona measure trailer weight as GVWR or actual weight?
Arizona uses gross weight, so weigh the trailer as you actually tow it rather than reading the data plate.
Where can I verify Arizona towing laws?
Start with the 2 official sources linked on this page, beginning with A.R.S. 28-952 Required brake equipment. Prefer state DOT, DMV, legislature, or public-safety pages over summaries from private websites. This page was last checked on 2026-06-18.
Disclaimer: educational summary, not legal advice. Statutes and enforcement practice change — verify the Arizona sources linked above before towing.