Rockwood Roo 21SS - Tow Vehicle
I am in the process of downgrading my Tow Vehicle from an '08 GMC Yukon Denali rated at 8100# towing max to a Toyota 4Runner w/4.7liter V-8 rated at 7,000# capacity. I am also looking to upsize from a...
Forum Discussion
Kcskitek wrote:
Okay, here lies the problem with the Roo 21SS. The specs call for a tongue weight of 645 lbs and a GVWR of 5,626 lbs. Here is the definition of "Tongue Weight"
Tongue weight
The downward weight applied by the towable equipment on the hitch ball. In general tongue weight should be around 7 to 8 percent of GTW and should not be more than 10 percent of the GTW.
According to my calculations, the formula indicates greater than 10%, so technically they manufactured a trailer that you can't tow. The maximumtrailer capacity for the 4Runner is 7,000 lbs, but the class III hitch says 5,000 lbs is the max. I am not sure if I have a class III or IV hitch. The hitch appears to be from the factory, but how do you tell? The hitch appears to be a round tubular frame and is mounted to the chassis, where the other hitches I see on the 4Runners are attached directly to the frame (No round tube portion).
I have a 2008 4Runner 4x4 V8 with the OEM hitch. Stamped on the hitch is the max tongue weight of 1095 lbs. And stated tow capacity for the 4x4 V8 model is 7000 lbs. The round tubular hitch you describe IS factory, and is ONLY on the V8 equipped 4Runner. the other hitch you describe is attached to the rear crossmember, and ONLY appears on the V6 models. The V6 models have a stated towing capacity of 5000 lbs.
