Converting Boat Trailer to Hydraulic Disc Brakes to Use In Saltwater

Question:

Hi, I plan on converting my trailer to disc brake system however trailer will be immersed in saltwater 30-50 times per year. What it is the corrosion protection that is applied to the rotors and calipers? Is there a saltwater version for the same braking rating? Thanks

asked by: Tom

Expert Reply:

For a trailer that will be used in saltwater, the best option for rotors, hubs, and calipers is those made of stainless steel. Galvanized coating is the second best option for saltwater, and then dacromet coatings, which provide extra resistance to saltwater over standard assemblies that are not treated.

For the number of times a year you plan to launch in saltwater, I recommend going with components that offer the most rust and corrosion resistance, like stainless steel components. We have all the parts you will need, however they are not already pieced together in a kit. Stronger coatings or stainless steel components will require a bit more of an investment, but the quality is well worth it.

I recommend the Kodiak Disc Brake Kit with 10 Inch Hub/Rotors with 5 on 4-1/2 Bolt Patter for 3,500 Pound Axles # K2HR35DS. This kit contains dacromet plated hub-and-rotor assemblies and dacromet mounting brackets, while the calipers are stainless steel. This kit includes assemblies for 1 axle.

For a kit a that is made from more stainless components with a galvanized hub, you could go with # K1HR35D. These components will stand up the best against saltwater. This kit includes the components needed for one wheel.

Additionally, for saltwater, I recommend using flex lines for the brake lines rather than traditional stainless lines. The stainless lines offer very little protection against saltwater. Flex lines will stand up better against corrosion. I have attached a link to our trailer brake line kits for tandem axle trailers for you. If you trailer needs 20 feet of brake line, I recommend the Kodiak Hydraulic Brake Line Kit # 20TA-BLKIT. Kodiak uses brass and stainless steel fittings on their lines to further help protect against rust and corrosion.

The Dexter Brake Actuator # 099-175-20 is a great choice for an actuator. The electric lockout will not require you to exit your vehicle to back up your trailer, and the zinc-coating will resist corrosion.

I have attached a help article on adding hydraulic disc brakes to a trailer for you.