And this is how it works:
An Xtracycle can attach to just about any bike. It's wonderful for carrying loads because the Xtracycle lengthens your wheel base which makes your bike a LOT more stable! As a result, you can load it lopsided (25 pound bag of onions on one side? No problem!) or just load it UP (130 lb buddy? No problem!). Plus, the long bag with cinching straps and large surface area of the wood "snap deck" are GREAT at accommodating awkward loads that couldn't even dream of fitting into panniers!