SumoSpring Helper Spring Recommendations for a 2015 Forest River Motorhome on Sprinter Chassis

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Question:

Hi. I am looking to purchase both front and rear SumoSprings for my 2015 Forrester RV on 2014 Sprinter chassis 3500 2WD DRW . It has a GVWR of 11030 and fully loaded I am close to GVWR front axle weight ~ 4100 lbs and rear axle weight ~ 6900 LBs. I do not tow a vehicle but I do normally carry 2 ebikes on my back hitch ~ 130 LBS including bike carrier . Looking to reduce side to side sway when coming out of driveways/gas stations/etc as much as possible but not so much to make drive feel more stiff. I was looking at SumoSpring SSF-106-40 blue on the front but on the fence on whether to go with SSR-338-47 black or SSR-338-54 yellow on the rear. ?, Can you help me decide? Thanks

asked by: Bill

1

Helpful Expert Reply:

I'd be happy to help!

Going with the SumoSprings Solo Custom Helper Springs for your 2015 Forest River RV (on the MB Sprinter chassis) is an excellent idea as they are more forgiving than the Timbrens but they also provide stability for that side to side sway like you said.

For the front you want the part # SSF-106-40 that you stated, and for the rear I recommend the yellow kit # SSR-338-54 rated at 1,400 lbs over the black kit # SSR-338-47 rated at 900 lbs. The reason I recommend the heavier duty set is because these are close enough in weight capacity and you'll have your motorhome loaded up enough that the extra stability will really just help stabilize your motorhome more.

The nice thing is that the SumoSprings won't be adding so much more stability that it makes your ride more stiff. It will sway less, but it will give you back more control since you won't be fighting it as much.

Attached are some videos for you to check out!

expert reply by: Jon G

1

Answer 1

The correct SumoSprings for your 2016 Winnebago ERA170A 2WD Camper Van are listed below: Front - #SSF-106-40 Rear - #SSR-338-47 OR #SSR-338-54 I recommend going with the rear #SSR-338-54 because they have a higher weight rating so they will offer…

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Answer 2

There is suspension enhancement for a 2018 Mercedes Sprinter 3500, assuming you have a 2-wheel drive and standard suspension (as opposed to the option air-ride suspension on some Weekenders), although there are no air bags or air suspension…

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Answer 3

You were definitely on the right track looking at SumoSprings, but the fit is going to depend on whether or not you have a 2WD or 4WD Sprinter. For 2WD you'd need part #SSR-338-54 for the rear and part #SSF-106-47 for the front. For 4WD you'd…

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Answer 4

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Answer 5

The SumoSprings Maxim Custom Helper Springs like part #SSR-336-47-1 do indeed offer a better ride quality when compared to the SumoSprings Solo Custom Helper Springs like part #SSR-338-47 which is what I assume you are referring to. However, the…

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Answer 6

Correct, the SumoSprings Solo Custom Helper Springs part #SSR-338-47 will have a softer ride than the SumoSprings Solo Custom Helper Springs part #SSR-338-54 as it's made of a softer spring. That said, the latter will also provide more support.…

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Answer 7

When flat towing your 2011 Kia Soul, there are a few things that are needed. You need base plates, a tow bar, safety cables, wiring for the towed vehicle lights, and a supplemental brake system. The base plates I recommend are the Blue Ox Base…

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Answer 8

For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the vehicle…

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Answer 9

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 10

The Roadmaster Exact Center Steering Stabilizer w/ Custom Brackets #RM47MR typically comes centered and you would only need to make adjustments after installation and testing to see if it continues to pull. If you adjusted it all the way out to where…

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Answer 11

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 12

It sounds like the purpose of getting the air helper spring would be to counteract the 1 inch compression you're getting in your rear suspension caused by the pin weight of your 5th wheel. If that's the case, I believe that the AirLift 5000…

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SumoSpring Helper Spring Recommendations for a 2015 Forest River Motorhome on Sprinter Chassis

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