J2807 for smaller vehicles
As far as I know, only Toyota and Ford currently apply the SAE J2807 standard to rate towing capacity of vehicles that aren’t trucks. What do you think? Can we believe these numbers? I would like t...
Forum Discussion
Actually, the more you know about how to spec the correct truck for the job at hand, the more you realize that the J2807 specs are pretty meaningless. useless etc too!
One, 35 mph min on a 4% grade. Yeah at 100F with AC on, but that is still 5 mph below my states min speed on an interstate, which can be as steep as 6% for long stretches, short bursts to 8%. 40 mph on a 6% grade would be more meaningfull, at least then I am still at legal speed.
Min start is 12% grade. My sister lives on an 18% grade road. My old drive way was 20%, and a road I had to go up was 24.5% in the north end of Seattle. I also had a client with a 33% grade driveway off of lake Washington. That 12% minimum does not get you up the steepest of side streets if you have to around the greater Seattle area at sea level to 1000' elevation! 20 min, with a known deduction at 30 and 40% would be better so those of us that are more in the local road mix doing contruction would be better off than a hwy only user as the current spec is set for.
The frontal area is 60 sq ft for rigs under 8K IIRC, and 80 Sq ft for rigs over 8K. How many of you have rigs over 80sqft? probably most of you, so what is the deduction for those of you with front bedroom slide 5w's with 110-120 sq ft of frontal area? At one time, Ford had for full sized pickups, the ratings were up to 10K and 80 sq ft, 81-100 was deducted to 7500 lbs, 101-120 was 5000 lbs of trailer, no trailer over 120sq ft was recommended to be pulled by a full size F series pickup! Where is the equal deductions?
So yes, in a nutshell, the spec from a we are all equal is good! but from an end user that pushes the limits, total useless and meaning less numbers!
Marty
One, 35 mph min on a 4% grade. Yeah at 100F with AC on, but that is still 5 mph below my states min speed on an interstate, which can be as steep as 6% for long stretches, short bursts to 8%. 40 mph on a 6% grade would be more meaningfull, at least then I am still at legal speed.
Min start is 12% grade. My sister lives on an 18% grade road. My old drive way was 20%, and a road I had to go up was 24.5% in the north end of Seattle. I also had a client with a 33% grade driveway off of lake Washington. That 12% minimum does not get you up the steepest of side streets if you have to around the greater Seattle area at sea level to 1000' elevation! 20 min, with a known deduction at 30 and 40% would be better so those of us that are more in the local road mix doing contruction would be better off than a hwy only user as the current spec is set for.
The frontal area is 60 sq ft for rigs under 8K IIRC, and 80 Sq ft for rigs over 8K. How many of you have rigs over 80sqft? probably most of you, so what is the deduction for those of you with front bedroom slide 5w's with 110-120 sq ft of frontal area? At one time, Ford had for full sized pickups, the ratings were up to 10K and 80 sq ft, 81-100 was deducted to 7500 lbs, 101-120 was 5000 lbs of trailer, no trailer over 120sq ft was recommended to be pulled by a full size F series pickup! Where is the equal deductions?
So yes, in a nutshell, the spec from a we are all equal is good! but from an end user that pushes the limits, total useless and meaning less numbers!
Marty
