Determining Which HydraStar Disc Brake Kit Fits 2017 Grand Design Momentum W/ Triple Axles
Published 09/21/2021
Products Featured in This Question
Question:
Trying to see what version would fit my trailer, the HSE7K-TRI and HSE7K-TR1SO? I only ask because i do not know what bearings and seals my trailer uses. So Im not sure if i can get away with doing the cheaper kit or do i buy the more expensive kit that said it comes with hubs, but then i read father down saying it doesnt, that it only comes with bearings and seals. Can you point me in right direction to find out such info please?
asked by: Jeff F
Helpful Expert Reply:
I would be happy to help you determine which disc brake kits fits your 2017 Grand Design Momentum M399TH Toy Hauler but you will need to first confirm your bearing combination.
The easiest way to do this is by removing one of your current hub assemblies and checking the face of both the inner and outer bearings for a stamped bearing number as shown in the included picture of the # L44649.
If your bearings are worn to the point that you cannot read the bearing numbers then you will need to use digital calipers # PTW80157 to precisely measure your spindles in the locations shown in the included diagram.
Both the HydraStar Disc Brake Kit # HSE7K-TR1 and # HSE7K-TR1SO are designed for 7000lb axles, the only difference is the # HSE7K-TR1 has rotors with built in hubs where with the # HSE7K-TR1SO you will need to purchase six of the idler hubs such as the # 8-231-9UC1-EZ separately.
If you can send me your bearing combination I would be happy to confirm the correct components for your specific trailer.
I included videos of the products mentioned for you to take a look at.
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Hydrastar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 1/2" Studs - 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 >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: DeeMaxx Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 13" Rotor - 8 on 6-1/2 - 7K
- Shop: Dexter Trailer Idler Hub Assembly for 5,200-lb to 7,000-lb E-Z Lube Axles - 8 on 6-1/2
- Shop: DeeMaxx Trailer Idler Hub for 7,000-lb Axles - 8 on 6-1/2 - Galvanized
- Q&A: Idler Hubs and DeeMax Slip On Disc Brake Kit for 2019 Big Country 3360ss
- Shop: Dexter Trailer Idler Hub Assembly for 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - Galvanized
- Shop: Kodiak Disc Brakes - 13" Hub/Rotor - 8 on 6-1/2 - E-Coat - 7,200 lbs - E-Z Lube
- Shop: Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K
- Shop: Deutsche Hydrapro Alpha G-1600 Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi
- Q&A: Parts Needed to Install Disc Brakes on a Trailer with Drum Brakes
- Q&A: Electric Over Hydualic Disc Brake Setup for 2020 Grand Design Momentum 376THS
- Q&A: Upgrading Hubs From 6 Bolt to 8 Bolt for 5,200 lb Axles
- Q&A: Replacement Grease Seal for National 413470 Seal
- Q&A: Correct HydraStar Disc Brake Kit for 50' Kaufman Car Hauler Trailer
- Video: Feature Review DeeMaxx Disc Brake Kit w/ Actuator for Tandem Axle Trailers
- Video: Dexter Axle Trailer Hubs and Drums - Hub - 8-231-9UC1-EZ Review
- Video: Detailed Breakdown of the DeeMaxx Trailer Idler Hub for 7,000-lb Axles
- Q&A: Disc Brake Replacement for Boat Trailer With 6k Dexter Torsion Axle
- Video: 2020 Keystone Montana Fifth Wheel DeeMaxx Disc Brake Kit: Complete Installation
- Search Results: idler hub
- Search Results: accessories and parts
- Video: Titan Hydraulic Brake Lines and Fittings Review
- Video: Ultimate Overview of the Kodiak Hydraulic Brake Line Kit
- Video: Set up: Kodiak Hydraulic Brake Line Kit on a 2018 Shasta Phoenix Fifth Wheel
- Search Results: 1/2 wheel stud
- Search Results: wheel studs
- Search Results: 1/2 inch studs
- Search Results: trailer idler hub
- Search Results: kodiak trailer hubs and drums