The SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 will cover one axle. If you have a tandem axle and want to get both of them supplemented, you will need to get two sets. They currently are not offered as combined sets for tandem or triple axles. view full answer...
The Trailer Hub and Drum Assembly - 4,400-lb E-Z Lube Axles - 10" Diameter - 6 on 5-1/2, part # 8-407-5UC3-EZ, comes with everything you need for one brake assembly. You will need two if wanting to install a pair.
I have included a video review link below. view full answer...