Take a look at their options. I purchased the 3 place rack, which comes with a front strut which clamps from the front rack tube ..down to the jack post. IIRC that option provides for around 150 or 160 lbs.
We used to carry 3 bikes when we had a young adult child was at home. I now carry 2 e-bikes, but they are Trek Dual Sports, which weigh 39 pounds and 43 pounds (sans batteries, but with some accessories mounted, like fenders, rear rack, etc)
I have never encountered any problem with any of my setups of 3 mountain bikes and now 2 e-bikes. There is some movement of the whole system, when loaded and going down the road. Be SURE to rotate the handlebars on the rearmost bike. I have a dimple in the AS curved panel, where a bar end got into it. In addition, to keep the rack from working down in the stanchions, I drilled a hole through the rack post which insert into the stanchions, as well as the afore mentioned front strut, and installed a lynch pin through the rack posts at the height I want it.
"If the women don't find you handsome, they should at least find you handy." - Red Green