What Seal Size Comes With The Hydrastar Disc Brake Kit HSE7K-T1
Updated 08/07/2025 | Published 07/12/2025
Products Featured in This Question
Question:
The disc brake kit I ordered shows that it comes with a seal inner dia. of 2.250. I have a 7000lb AL-KO axle that from research shows a seal with a 2.125 inner dia. Is that possible? My order number was 122952026
asked by: Robert D
Expert Reply:
Hello Robert, thanks for reaching out. The Hydrastar Disc Brake Kit # HSE7K-T1 does come with the 2.250" ID seal. If you are needing the 2.125" ID seals you can use the following:
- 10-10 Grease or Oil Double-Lip Seals - Qty 2 # RG06-090
Both seal sizes are used for 7,000 lb axles. The 2.250" is more common but both are definitely out there.
(click to enlarge)
Product Page this Question was Asked From
Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K
- Trailer Brakes
- Disc Brakes
- Marine Grade
- 8 on 6-1/2 Inch
- Hub and Rotor
- 1/2 Inch Studs
- 7000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- Hydrastar
more information >
Continue Researching
- Q&A: Parts Needed to Add Disc Brakes to 2018 Keystone Montana 3121RL
- Q&A: Disc Brake Conversion Kit for a 5th Wheel Trailer w/ 7,000 lbs Axles
- Q&A: Recommended Conversion Kit for Disc Brakes On 7,000 Lb Dexter Axles
- Q&A: Disc Brake Conversion Kit For 2021 Grand Design Solitude 310GKR With 7,000 lb Axles
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Q&A: Recommended Disc Brake Upgrade Kit for Lippert 7,000 lbs Axles
- Q&A: What Disc Brake Kit Will Fit My 5th Wheel With Two 6K Axles?
- Q&A: Kit to Convert 7k Axles of 2024 Brinkley Z3100 to Electric Over Hydraulic Disc
- Article: The 5 Best Trailer Drop Hitches You Can Buy
- Article: Adding Electric Over Hydraulic Disc Brakes
- Article: Trailer Wiring Diagrams
- Article: Electric Trailer Brakes: How They Work & What to Buy
- Article: Brake Controller Installation: Starting from Scratch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
Jesse M.
8/7/2025
Hey Robert, did the 10-10 Grease or Oil Double-Lip Seals work out for your 7000lb AL-KO axle? I'm curious because it could help others in a similar situation.