What Info Is Needed to Pick Out Replacement Brakes on Boat Trailer

Updated 04/27/2020 | Published 04/24/2020

Question:

Im trying to replace the drum brakes on my 2001 magic trailer for a 25 foot Cobalt boat. The boat weight is around 4,500 lbs. When ordering the new brakes how do I determine the axle load weight? The trailer is dual axle and is rated for 7,500 lbs. Thanks,

asked by: David L

Expert Reply:

To pick out the correct brake assemblies for your trailer you need to know a few things.

You will want to measure the inner diameter of your hub/drums and the depth of the drums to determine what brake assembly dimensions you need. For example the part # 23-27 is a 10 inch by 2-1/4 inch thick brake assembly.

You also want to determine what the bolt pattern is of your assembly mounting flange. The standard size is 4 on 4 inch. You also want to determine the axle capacity of your trailer and go with an assembly that has the same rating, the # 23-27 has a 3,500 lb capacity.

expert reply by: Jameson C