So I was trying to find a way to recycle my old grocery bag holder from my beach cruiser days. But the clips won't fit on the Rad racks because their to thick. So I stumbled upon these Knuckle things on etsy. This is a review for a product I have yet to install. Yes, very helpful. But I received them this Sunday and intend to get them installed within the next week. I ordered 2, one for my 'Runner rack and another for the 'Mini Rad in-house brand rack. I have my grocery bag holder I want to recycle and the lady I got the 'Mini for has a Sunlite bag she would like to use. I have to cut a section out of my SHAD motorcycle trunk base to make the Knuckle fit my 'Runner. But as soon as I get them installed I'll put them (Knuckles) thru my crazy riding (I joy ride the 'Mini when I visit!). Keep everyone updated....