Installing Front Sumo springs on my Promaster 3500 Roadtrek Simplicity 

Right at 5:20 on the video I scrolled up some text that said it was about the same when done. The rear raised about 1" but the front was only about 1/4 ". I do have a slight rake to my van now so when I park for the night , I find a spot to compensate or I drive up on my blocks.

No, Probably even stiffer but the control is sooo much better.

@@Flicka20 thanks for replying. Just trying to soften the ride On mine if you go over the cats eyes it's like hitting a brick 👍

They have some at O Reilly auto parts for $15

Ken, Here is a post I made in a face book group about the Sumo Springs. Seems everyone that has them likes them. Travis Miller I just got back from the test run of the front springs installed. ** Here was my post from before on the rears alone:** On the test drive I didn't notice too much difference in the ride.. maybe a little. .hard to say. But where I did notice a BIG difference is in cornering. The Van has lost that top heavy (wallowing) feeling as you round a corner at speed. That was the part that bothered me the most before and this correction was really what I was hoping for with the Sumos. For 200 bucks it was well worth it to me ................. ** And after the install of the front springs.**..... I really wasn't expecting much. After all, its just a couple rubber donuts so how much help can it be. I took the van down to a parking lot with speed bumps for the first test and I may be more impressed with what they did to tame the bumps than what the rears did to quill the high speed sway ( actually equally impressed with both). Before, when crossing the speed bumps at an angle you would feel a pretty violent toss sideways. That toss is gone!! The van just stays upright and steps right over the speed bump! Also, going into driveways on an angle would produce that same "toss" and now that's gone too!. I then went down the same twisty road I used for the test with the rear sumos only. Here, I didn't notice a whole lot more improvement with all fours installed but the rear springs really made a difference to start with. Cornering was a little stiffer with the fronts added. Almost no sway, staying upright throughout the corner. It all felt really really good though! So my final conclusion is: You need both font and back. They really compliment each other and do their job in different ways.

Here you go! Sumo was giving Roadtrekers a 10% break with coupon ROADTREK10 Amazon has them too. SuperSprings.com: Rear - SSR-313-54 - $212.63 Front - CSS-1195 - $138.38

STill working as advertised. I really notice the difference when on a curvy road

@@Flicka20 thanks for the reply

The front sumo's only lifted about 1/4 ". The rear sumo's lifted it about an inch.

Evidently you just did! Why not expend less effort for the same result!

@@Flicka20 As the saying goes "It's hard to have a battle of wits with an unarmed person."

@@jackriley5974 This just shows how little you know. If you don't leave the tires on there is not enough weight to stretch the springs and slip the donuts in!