From the outside of one eyelet to the outside of the other is 175mm. Wayne from The Touring Store didn't really believe that I was measuring right, so I took a picture to show him the odd shape of my rear end (snerk).
I thought about trying to bend my old rack out, but my husband really needed one too, so once I decided I couldn't use it, I put it on his bike-- I think he'd be pretty grumpy if I took it back off his and bent the daylights out of it.