Hi,
My partner and I are planning a trip for next year which includes the GDMBR northbound. We plan to ride from our hometown Vancouver BC down the pacific coast route into Mexico and possibly further south. Returning home we plan to tackle the GDMBR. We both have 26" traditional geometry touring bikes running 2" tires with rear racks and front lowriders. I'm wondering how you'd rate doing the GDMBR with lowrider racks and regular Ortlieb Frontrollers. I'm mostly concerned about clearance / pannier wear. Insane? Difficult but possible? or no real big problem? Should we switch to mid or high rider front racks before hitting the rougher roads? Let me know your thoughts.
Happy trails
Despite what the guidebook claims, lowriders aren't a problem at all.
Use the biggest fast-rolling knobby tires you can fit on your bikes. For NM I recommend tubeless or at least some "Slime"-type tubes.
Plenty of people have completed the GDMBR on such bikes. The lack of front suspension will increase your suffering though.
Your main worry should be timing. The window to start from the South is quite short.