Maxicam makes heavy duty weight storage racks, made to accommodate any standard dumbbells. This rack will store up to 16 or 8 pairs of dumbbells. This is the perfect rack to safely and neatly store heavy dumbbells in the 50 lb range as well as lightweight dumbbells.
This rack is rated by the manufacturer as having a maximum capacity of 400 pounds of weight.
This can hold 9 dumbbells ranging in weight from 5 to 50 lbs for a total of 450lbs
The Maxicam Spider Rack has a maximum weight capacity of 800 pounds.
This rack can easily hold up to 180 pounds of dumbbells.
This rack measures up at 41" inches tall and has a maximum weight capacity of 270 lbs.
This unit is designed to store 6 bar handles and accessories.
The product description for this Maxicam dumbbell rack states that it will hold 6 pair or a maximum of 12 dumbbells of any standard weight, with no maximum capacity listed. This is a heavy duty rack weighing over 100 lbs.
The manufacturer's info does not give a specific weight capacity, but says that the rack hold 12 pairs of dumbbells with the larger ones relegated to the bottom shelf. Apparently if the dumbbell fits the rack, it will hold 23 more just like it.
Unfortunately this rack is designed to hold only 10 pairs of dumbbells from 2.5 to 25 pounds with a maximum weight capacity of 25lbs.
First, check your car owner's manual or check online for the specification. About 100 lbs. is the typical manufacturer's suggested weight limit, The load capacity of the rack rails is really the issue.
The weight limit on an ATV truck rack can be found on the websites that sell ATV truck racks. The weight would depend on the size of the rack & truck.
I have a 2005 Sportsman 500; in my manual, I could not find a horsepower rating. However, I did find these numbers: towing capacity is 1224 pounds, the front rack weight capacity is 90 pounds and the rear rack capacity is 180 pounds. I know that these are not the horsepower numbers you were looking for, but I thought I would share them in case you are looking to haul and tow with your quad.