brulaz wrote:
http://thechronicleherald.ca/wheelsnews/1229762-sae-j2807-the-new-common-standard-for-tow-ratings
The brake test requires the truck (if SRW under 13K GVWR) be able to stop the max trailer weight in 35 feet from 20 mph "without the use of trailer brakes while remaining within a standard 11.5-foot wide lane." There's nothing about repeated stops and brake fade or higher speeds. Still, it's better than nothing.
Interesting...
article wrote:
The vehicle must be capable of stopping within 35-80 feet or less (as per number of rear wheels and GVWR above) from 20 miles per hour without the use of trailer brakes while remaining within a standard 11.5-foot wide lane
You only have 35 feet if you are 13K or lower with single wheel. You have MORE DISTANCE to stop if you have a dually. You have WAY MORE DISTANCE if you have a dually over 13K GVWR.
So lighter trucks carrying their max weight have to stop in shorter distances than dual axle trucks at their max weight...