How to Find Disc Brakes Converting From Drum Brakes on Boat Trailer With 5 on 4-1/2 Bolt Pattern
Question:
Good morning I have a 2006 EZ Loader tandem axle boat trailer for 21 aluminum boat. 5 on 4-1/2 B.P. Flooded hubs, surge hydraulic drum brakes 1 axle. in/out of salt and fresh water, constant problems with drums locking up. Would like to convert to disc but not sure whether to stay with surge or go electric to hydraulic conversion? Suggestion?
asked by: Tom H
Expert Reply:
Going to electric over hydraulic is probably a bit of overkill, and disc brakes will serve you very well, but without the locking up. So that's the route I recommend, and since you have a 5 on 4-1/2" bolt pattern it is likely you have a 3,500 lb axle, but you need to verify. To switch from drum brakes to disc, because you have to replace your hub you will also need to know the bearing numbers you have, which you can find by either measuring your spindle or removing your current hub and finding the numbers on the bearings themselves.
For example, if you have a 3,500 lb axle with inner bearing L68149 (1.378" inner diameter) and outer bearing L44649 (1.063" inner diameter) then use the Kodiak Disc Brakes - 10" Hub/Rotor - 5 on 4-1/2 - 3,500 lbs # KOD67FR.
I have added a link below to our selection of disc brake hub and rotor options with a 5 on 4-1/2" bolt pattern for you once you find out exactly what you have. The other thing you will need to do is replace your actuator with a disc brake actuator. This will depend on the hitch ball size and weight rating you need; for example if you couple to a 2" hitch ball and need something with at least 7,500 lb capacity go with the Dexter DX7.5 Drop-N-Go Brake Actuator # 099-175-20.
I have added a link below to our entire selection of disc brake actuators for you to check out as well.
Products Referenced in This Question
Kodiak Disc Brakes - 10" Hub/Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs - E-Z Lube
- Trailer Brakes
- Disc Brakes
- Marine Grade
- 5 on 4-1/2 Inch
- Hub and Rotor
- 1/2 Inch Studs
- 3500 lbs Axle
- 13 Inch Wheel
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- Kodiak
more information >
Product Page this Question was Asked From
Dexter DX7.5 Drop-N-Go Brake Actuator - Disc Brakes - 2" Ball - Zinc Plated - 7,500 lbs
- Brake Actuator
- Surge Brake Actuator
- Straight Tongue Coupler
- Bolt-On
- 7500 lbs GTW
- 2 Inch Ball Coupler
- Disc Brakes
- Electric Lockout
- Dexter
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Mounting Bolts and Hardware for 10" Brake Assemblies
- Shop: Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Dacromet and Stainless Steel - 3,500 lbs
- Shop: Replacement Inner Member for Dexter DX7.5L Actuator - Tandem Axle w/ Disc - 2" Ball - 7,500 lbs
- Shop: Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs
- Search Results: 099~060~20
- Search Results: k2r35d
- Search Results: dx99fr
- Q&A: Parts Needed To Install Electric Over Hydraulic Disc Brakes On a 2021 Grand Design Imagine XLS 21BHE
- Q&A: Are Dacromet and Stainless Brake Finishes Good for Boat Trailers
- Shop: Dexter Disc Brake Assembly - 13" Hub/Rotor - 8 on 6-1/2 - Dacromet - 7,000 lbs
- Shop: Dexter Premier Disc Brake Kit - 10" Hub/Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs
- Shop: Kodiak Disc Brakes - 10" Hub/Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs - E-Z Lube
- Search Results: 25580
- Shop: Trailer Hitch
- Q&A: Recommended Replacement for Atwood Surge Brake Actuator 85778
- Article: Most Popular Wheel Bearings
- Shop: Trailer Wiring
- Article: Trailer Wiring Diagrams
- Search Results: surge brake actuator
- Q&A: Replacement Drum Brake Actuator for a 1995 4 Winns Model 3916 Trailer
- Video: DeeMaxx Disc Brake Kit Review
- Shop: Brake Controller
- Article: How to Bleed Your Trailer Surge Brakes
- Search Results: brake line
- Search Results: brake actuator
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Video: Kodiak E-Z Lube Disc Brakes Installation
- Q&A: Can Electric Brakes be Used on a Boat Trailer
- Video: Demco Electric Lockout Hydraulic Brake Actuator Installation