I can't answer your question but I will caution you to pay attention to their actual size. You could put 2 on each side of a S10 and it wouldn't be too much. They are not very big.
I did notice 19 liters each , sounds like 2 tank bags . I will look at them in person before I
buy. I was impressed by the looks of the mounting hardware and that you could secure
bags without peg and tail straps .