I think it's 10kg (22 lbs) but I've had a look and can't quickly turn up the paperwork.
If you are considering one for the S4RT, and you have the later type seat with the blocks protruding downward either side of the latchpin, I'd confirm with them that the brackets are compatible.
The rack I was supplied with - claimed to fit the S4Rs - wasn't compatible with my S4Rs seat. I used it for a while with an earlier type seat, which isn't a perfect match for the seat rails etc but will work. With help of dealer, sent pics of the issue to Ventura and they acknowleged the problem but I heard nothing since.
PM me if you want more. I'm no longer using the system, and happy to sell if we can organise shipment and payment. Has about 8000 miles of use, includes tall and short racks and grab-rail. Has Aero Spada bag but stitching on one side-pod has given way.
