Rack for Specialized Sirrus
 

My friend wants to try commuting. She has a Specialized Sirrus hybrid, an aluminum frame bike. I'm struggling to find a rear rack that will fit. It has a 135mm rear spacing and the frame members are thick, so any rack needs to very wide, in the range of 150mm/6" or so. Any recommendations?

Most racks should work, I would recommend a Topeak rack if you need one for discs get one of those other wise the regular one would work just fine. I don't know where you are looking but I would guess don't look there or just go to your local shop and let them fix it.

Ortlieb QuickRack is a great option.