Surly said it best in their blog post that I can't find, it was called something like "Answers to common forum questions" and one was; Can I fit a rack to my bike that does not have rack mounts? and the answer was simply, "yes you can, with P clips"
Solutions like drilling the dropouts it great if you have the time/money/skills to get it done, I strongly think P clips offer the best performance for your £.
Many people have already mentioned Tubus and for very good reason their racks are top notch (backed up by their guarantee). They sell their own P-clip based mounting kit for all their racks.
They may be made in China but unlike most manufacturing there, the land, factory and workers are all owned, paid amd trained directly by Tubus (most company's out source the manufacturing, leaving them with less power over QA), Orbea bikes do the same thing for their US and AUS bikes (UK ones are all made in Spain and Portugal) and they have more issues with their Portuguese manufacturing than their China factory. The racks might as well be made in Germany.
A Tubus rack with their own "Clampset" (P clip) mounting system sounds like the best option for you, and for most people.
Surly said it best in their blog post that I can't find, it was called something like "Answers to common forum questions" and one was; Can I fit a rack to my bike that does not have rack mounts? and the answer was simply, "yes you can, with P clips"
Solutions like drilling the dropouts it great if you have the time/money/skills to get it done, I strongly think P clips offer the best performance for your £.
Many people have already mentioned Tubus and for very good reason their racks are top notch (backed up by their guarantee). They sell their own P-clip based mounting kit for all their racks.
They may be made in China but unlike most manufacturing there, the land, factory and workers are all owned, paid amd trained directly by Tubus (most company's out source the manufacturing, leaving them with less power over QA), Orbea bikes do the same thing for their US and AUS bikes (UK ones are all made in Spain and Portugal) and they have more issues with their Portuguese manufacturing than their China factory. The racks might as well be made in Germany.
A Tubus rack with their own "Clampset" (P clip) mounting system sounds like the best option for you, and for most people.
http://www.tubus.com/en/spares-and-accessories
Scroll down to the "Clampset for mounting a carrier on seat stays without eyelets" get yourself and Tubus rack and away you go!
I know I have largely repeated what others have said but please see it as reforcement of their points.