I would like to get a rear pannier rack for a Surly LHT that will allow me to mount two sets of pannier bags. I want to put Ortlieb Front Rollers towards the front (for heel clearance reasons) and Back Rollers towards the rear. By my measurements, if I cram them together, the minimum mounting rail length I'll need is 48cm. The problem is, of all the racks I've found thus far the longest is 44cm. Furthermore, I'd like to get a steel rack for repairability purposes, or perhaps in order to do a some custom welding to modify if necessary.
I've been told a trailer might better suit my purposes, but I really don't want to deal with the issues that raises and would like to be able to put my bike on a bus and carry or stow my stuff in pannier bags. Does anyone know of a rack that would suit my use, or a custom rack maker that I could go to?
My LBS has offered to rig up an extension for a smaller rack, but I'm not all that confident that would work out if I'm carrying close to 80 LBS of gear on the rack.
Thanks for any suggestions.