Roof Top Tent/ Rock Rack Load Limits

#1
Hey Guys,

Newbie here! Me and my girlfriend are looking to do a trip from south WA to Cairns in the winter months. We've got a Subaru Forester 2003 and we'd prefer to purchase a roof top tent. We've been looking at a Kings roof tent that weights 57kg.

To get to the point, I'm hoping for some advice about load limits. Our owner manual says 80kg load limit on the roof rails but whenever I look for roof racks (Rhino, Prorack etc) the load rating drops down to 60kg. From what I understand through research so far it should be fine when the car is static but I'm concerned that a 57kg tent on a 60kg roof rack may create problems when the car is on the road and off road.

Would I be okay with a 60kg roof rack? Why is my owner manual saying 80kg but rock racks are 20kg short? Any advice/discussion appreciated.
 

mac_man_luke

Well-Known Member
#2
Manufacturers rating is for what the roof can take, rhinos rating is what the rails themselves can take. No heavy duty options? most have options for stronger attachments that normally offer 150kg ratings etc

I wouldnt be too worried though, the ratings are no doubt have a large safety margin.

i would also make sure you have a go with a fold up style RTT, they can be quite an effort to setup / pack up although the height of the forester will make that easier than some 4wds.
 
#3
Manufacturers rating is for what the roof can take, rhinos rating is what the rails themselves can take. No heavy duty options? most have options for stronger attachments that normally offer 150kg ratings etc

I wouldn't be too worried though, the ratings are no doubt have a large safety margin.

i would also make sure you have a go with a fold up style RTT, they can be quite an effort to setup / pack up although the height of the forester will make that easier than some 4wds.
I know a car wholesaler that puts roof top tents on almost every type of car... Yes the load rating is there, but as ..mac said.... its underrated ... he has only ever had the one car come back with a problem that i can recall .. that was an out back that the tent was over tighten on... the roof racks on that car cracked near the roof... but some stickaflex fixed it up... they did their trip and traded that car back about 6 months later with no issues.
 

cam04

Well-Known Member
#4
Hey Guys,

Newbie here! Me and my girlfriend are looking to do a trip from south WA to Cairns in the winter months. We've got a Subaru Forester 2003 and we'd prefer to purchase a roof top tent. We've been looking at a Kings roof tent that weights 57kg.

To get to the point, I'm hoping for some advice about load limits. Our owner manual says 80kg load limit on the roof rails but whenever I look for roof racks (Rhino, Prorack etc) the load rating drops down to 60kg. From what I understand through research so far it should be fine when the car is static but I'm concerned that a 57kg tent on a 60kg roof rack may create problems when the car is on the road and off road.

Would I be okay with a 60kg roof rack? Why is my owner manual saying 80kg but rock racks are 20kg short? Any advice/discussion appreciated.
Subaru rating will be for the whole roof. Aftermarket ratings are per rack, of which you have 2 so you should be fine.
 

Hoyks

Well-Known Member
#5
The roof rating is really just a rating that the engineers decree won't upset the vehicle handling too much. You can sit another car up there and it not going to bend the body, well not much and its not going to do the paint much good.

Reading the fine print of the installation instructions, its 50kg per rack, or 33kg per rack off road. http://vpm.cdn.rhinorack.com.au/Instructions/Parts/Legs/SX003.pdf

If you want to spread the load out a bit more, stick a 3rd cross bar on the roof. It won't increase the load carrying capacity, but will anchor it to the roof and give some redundancy. I think it will do fine, just check the bolt and screw torque every few days.
 
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