You need to be very careful with the weight you are carrying with that kind of rack. I just checked some of the Topeak racks of this type, and they recommend a max of 15 pounds.

So the real question is how much are you planning to carry? Are you talking about carrying all of your gear (as in clothes, rain gear, toilet articles, off-bike shoes, food, camera, etc.)? If you are then I suspect this type of rack wouldn't be a good match. If you're just talking about snacks for the day and maybe a raincoat then I imagine you would be fine.

--- Denise