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Expert Answers about Grand Design Momentum G-Class TT Toy Hauler


  • Does Progressive Dynamics PD9280A Converter/Charger Have a Serial Number and Warranty
  • If you purchase it from us, the Progressive Dynamics # PD9280A Power Converter/Charger does indeed have a 14 digit serial number that begins with the letter 'A'. The carries the full 2 year manufacturer's warranty. This has been confirmed with my contact at Progressive Dynamics. If you click the provided link, you can see a product description video showing my buddy Jeff explain the features of the converter/charger.
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  • Jack Leg Extension for Lippert Jack to Give it Additional 4 inches for Taller Tow Vehicle
  • We have an easy solution for your Lippert jack to give it the additional 4 inches of extension you are wanting with the Fastway Flip Automatic Fold-Up Jack Foot # FA88-00-4500. This is the correct size for the jack inner tube diameter of your jack so it will fit easily and it provides and additional 4 inches of jack leg length automatically as you lower the jack.
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  • Can the Roadmaster Direct-Connect Base Plate Kit 131-8 Be Purchased Without Arms
  • In regards to the Roadmaster Direct-Connect Base Plate Kit part # 131-8, the base plate tab and removeable arms are sold as a kit. The base plate tab is not offered separately. That said, if you need to replace the removeable arms we do have an option for this, the Roadmaster Replacement Arms for Base Plate Kits part # RM-ARMS Please note, the Roadmaster Direct-Connect Base Plate Kit fits the following vehicles: 1992 - 1994 Chevrolet Blazer excluding 1-ton and Diesel 1987 - 1998 Chevrolet...
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  • Replacement Bearings and Seals for 7,000 lb Axles on Toy Hauler
  • From the information I was able to see online it looks like your 2019 Grand Design Momentum 381M has 7,000 lb axles which means you should be able to use Grease Seals 10-36 (pair) # RG06-070 that you were looking at. You will want to confirm this on your end though as well. The 10-36 grease seals have an inner diameter of 2.250" and an outer diameter of 3.376" so if you take a digital caliper and measure your spindle and current hub/drums where the seal rides you'll be able to confirm...
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  • Recommended Stabilizer Jacks for a 2023 Grand Design Momentum G-Class TT
  • Since your Grand Design is going to be well over the 10,000 lb cutoff, the Electric Ground Control TT Automatic 5-Point Travel Trailer Leveling System # LC672136 is not going to work, unfortunately. Your best option is to put one Ultra-Fab Power Twin II Electric Stabilizer with Dual Motors # UF39-941705 at the front of your trailer and one at the rear. With each of these stabilizers having a 6,000 lb capacity each, you'll be well over your GVWR and won't run into any issues. These aren't...
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  • Recommended Lionshead 16" Wheel w/ a 6 on 5-1/2 Lug Pattern
  • Sorry Steve but you were misinformed. The closest rim we have to the Phoenix in a 6 on 5-1/2 lug pattern is the Liger Trailer Wheel - 16" x 6" Rim item # LH97FR.
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  • Recommended Hitch for a 2021 Grand Design Momentum 25G Toy Hauler
  • To add a hitch to your 2021 Grand Design Momentum 25G toy hauler you are going to want the Adjustable Width Trailer Hitch Receiver item # C13702. This frame mounted hitch can be bolted or welded on and will fit as long as your frame isn't wider than 51". This is a class III hitch with a 2" receiver and is a universal fit. There are no custom fit hitches for your trailer. You will want to verify what your toy hauler's capacity is but this hitch can provide you with a 500 lbs tongue weight...
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  • Should Weight of Trailer be On Suspension for Determining Clearance of SumoSpring SS26MV
  • If you are measuring for clearance on your Grand Design 28G Momentum for the install of the SumoSprings kit part # SS26MV you'd need to measure with the weight of the trailer on the ground. I wouldn't go so far as to load the trailer down as much as possible but how it would be most of the time. This kit comes with spacers so that you can make the spring sit taller so that you can acquire the desired 1/4 to 1/2 inch of preload or they can be cut down shorter as well.
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  • Wet Bolt Equalizer and Shock Absorber Kit for 2019 Grand Design Momentum 28G
  • Yes the Dexter Heavy Duty Equalizer kit with Wet Bolts part # K71-359-00 is compatible with the Roadmaster Comfort Ride system part # RM-2460 for your 2019 Grand Design Momentum 28G.
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  • AreThe Lionshead Liger Aluminum Wheels Capable of Supporting Load Range G Tires With Higher PSI?
  • I recommend using the Karrier ST235/80R16 Radial Trailer Tire # AM10248 on your Lionshead wheels for your 2020 Grand Design Momentum 25G trailer. These tires are rated for 3,500lbs of weight per tire with a load range E rating at 90psi and the speed rating M(81mph) you are wanting. The tire also carries a 5 year warranty with 1 year worry free guarantee. Wheel manufacturers do not give a maximum psi rating for their wheels the way tire manufactures list their tires. Using a Load Range...
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  • How Far Below the Trailer's Tongue is the Lowest Point of the B&W Continuum?
  • I checked with B&W and when set up and ready to tow the lowest point of the system is 9" below the bottom of the trailer tongue. From the ground to the bottom of the B&W Continuum item # BW28FR is going to be a different measurement for each trailer. I can't give you that exact measurement because I have no idea how far off the ground your trailer's tongue is. I have linked a review video below so you can see how to get this system set up.
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  • Replacement Bearing Kit For 2021 Grand Design 25G Toy Hauler With 6K Dexter Axles
  • If you are looking for the bearing kit we have our etrailer Kit # BK3-100 or the Timken Kit # TMK42VR which is going to match the Dexter bearing 031-029-02, 031-030-02 and seal 010-036-00 numbers you were given. It would be best to just order the 4 sets you will need having a tandem axle trailer and if the bearings and races are safe to reuse you could simply order 4 of the seals # GS-2250DL or Timken Seals # TMK98ZR. Then you can keep the kits with the trailer in the event you ever have...
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  • Can Aluminum Liger Trailer Wheel LH97FR Handle 110 PSI With 15 Ply Tires?
  • The Aluminum Liger Trailer Wheel - 16" x 6" Rim - 6 on 5-1/2 - Black # LH97FR you have installed on your trailer should not have a PSI rating as this is typically limited by the valve stem, not the wheel. As long as you are using a quality high pressure valve stem like the # AM20906 rated for over 100 PSI you will have no issues running 110 PSI with them. I included videos of the products mentioned for you to take a look at.
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  • How Long is the Polar Cam Action Handle On The 45 Long Side-Door Bar Lock Assembly # PLR3057-45?
  • The Handle # 158-100 for the Polar 45" Long Side-Door Bar Lock Assembly # PLR3057-45 is 14" long and 1-1/4" wide.
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  • Replacement Leaf Spring and Shock Absorbers for 2020 Grand Design Momentum Toy Hauler
  • It appears you have 6K tandem axles. We have a few options for the replacement leaf spring but you will need to measure your spring center of the bolt to center of the opposite bolt to get the correct fit. I've linked the options for you. Then I do have the Roadmaster Comfort Ride Shock Absorbers for Tandem Axle Trailers - 5,200-lb to 7,000-lb Axle # RM-2460 which are my recommendation for your trailer to improve ride quality.
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  • Slide Cover Installation On Grand Design 28G Momentum Where Header Panel Can't be Found
  • If you can't find a header panel to install a Slide Topper awning rail like the # LCV000163287 into what you can do is put putty tape on the sidewall and then screws in all of the holes of the rails and you'd be good. Putty tape is very sticky and holds it well. The part # 3724162 is an 8 foot section of putty tape that comes with screws as well but you would probably want to use the screws you have already.
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