I am pleased to report that I am 100+% satisfied with the Trekker 20 Rear Panniers which I recently purchased from Velo Transit. My wife and I have just returned from a 200 mile self contained trip on the Ohio / Erie Towpath trail.. We rode on wet and dry pavement - rough and smooth, limestone, gravel, and dirt, the panniers remainder securely attached with zero bounce or wiggle to the rear rack through out. Also, I experienced no heel bump when carrying full bags Speaking of full bags, the interior space was more than adequate for this four day sojourn! After a day of ridding, the panniers were very easy to remove AND all items inside were DRY!! At one point, my wife had bike issues, so I put her rear panniers on my rear rack and put the Trekker 20s on my front rack and rode 25 miles with absolutely no issue!! The Trekker 20 "Rear"(?) Panniers, are a great addition to my touring Bike Friday!!!!