Originally Posted by no1mad

Never heard of them before, so I had to Bing 'em. I found Mango Cruisers (presumably out of FL) and Mango Bikes out of the UK.

Having looked at both sites, it looks like you are talking about the UK based one. What is odd is that they are calling a rear rack a pannier. Panniers - Mango Bikes.

Frame geometry doesn't look all that radical, so I question their claim that only a proprietary rack would work.