I don't know if I am in the right area but here it goes.
Long story short. I work for the fire department and commute to work on my bicycle with all my gear, and uniforms. I an riding in urban areas with mostly bike lanes but occasionally I have to get on a side walk or share road. I am riding a Redline Metro Classic and I pull a single wheel BOB trailer. (Please don't tell me to get a trailer with 2 wheels not an option. It is too unstable at the speeds I ride) The whole set up (bike, gear and trailer) weight well over 100 lbs. There is 35lbs on the front wheel, 50lbs on the rear wheel and 35lbs on the trailer wheel. I am over 200lbs. The average ride is about 20 miles but the longest is right at 30 miles.
I am having trouble breaking spokes (14 gauge) on the rear wheel. On my previous bike I upgraded to 12 gauge spoke but had issues with the 700c tires fitting properly. I haven't looked into a 12 gauge spoke, disk brake, 700c wheel yet.
What I am wondering is if a BOB trailer with a suspension would soften the bumps and lessen the shock load to the rear wheel? Any Ideas?