The thule the stacker th830 that you referenced is designed to carry up to 4 kayaks at once.
How many kayaks on a roof rack.
So as long as you have a roof rack on your honda odyssey and or subaru outback that has the weight capacity for the weight of your 4 kayaks this carrier should work well for you as this carrier is designed to fit nearly all cross bar shapes.
The manufacturer made sure to include 2 sets of racks for your disposal and granted a lifetime warranty that makes the deal as appealing as it can be.
The majority of kayaks will fit onto this rack as it can accommodate equipment up to 36 inches wide and 75 pounds heavy.
Vertical kayak racks will hold up to 4 kayaks at a time.
Trying to strap two kayaks to a factory installed roof rack or to an aftermarket roof rack that doesn t have roof rack attachments can be a challenge.
The number of kayaks you are going to transport is another big factor to consider when deciding on a roof rack.
On top of that they re easy to install and remove since they are just straps that go inside your car and over the top with foam padding.
Since you need to carry up to 3 kayaks and the longest one you have is 10 feet in length the thule stacker part th830 would be your best option.
If you use the proper method though most roof racks will easily support and carry two kayaks at a time.
Any of the other racks mentioned would require a second or third rack to carry all three at the same time since they aren t designed for carrying 3 kayaks like the stacker is.
Find your perfect kayak roof rack here.
Because the kayaks aren t at an angle as on j cradles it s possible to fit as many as four kayaks on a vehicle roof.
Malone seawing saddle rack.
Basically if you don t plan to carry more than 2 kayaks most solutions will work for you as double kayak roof rack.