My Buddy has one of these. Works really well and can fit more than you might imagine. It works well for our bikes (CB500F) as the pillion is flat and my friend has the attachment straps passed underneath it through the storage area. For the Rebel though, I'm thinking unless you have a rack or the pillion installed, it may be difficult to mount. I'm not too familiar with the physical attributes of the Rebel back there but I can attest to the bag itself.