Most Popular Leaf Spring Enhancement System for 2017 Ford F-350 Super Duty

Sumo springs work great. I was a little skeptical if they would work since the Dexter 5100 lb axles on my trailer have two ribs going across them, I'm assuming for strength. The sumo spring bracket was just wide enough to sit on top of the rib center point. The bracket could be 1/2" wider, it would help. I tapped the bracket in and torqued it. As you can see it didn't go in all the way but seems to be ok. Took a road trip, highway, gravel and a rough forest road. Checked the torque after the trip and nothing moved. Sumo springs helped with the trailer sway and should take some load off the springs and shackles. I am pleased so far with this product.

Easy to install only a couple hours for both axles. A more stable ride and haven’t broke any leaf springs on these great American highways, by the way I installed them on a 38’ 5th wheel rv.

I installed the TSS-107-40 on a 32ft. 7500lb. travel trailer about a year ago. I also installed front axle Sumo springs SSF-302-47 and rear axle Sumo Springs SSR-312-54 on my 2022 Ram 2500. This is a review for all 3. I Have been on 7 camping trips since the Sumo springs were installed on my trailer. There's a noticeable difference on good roads. Smooths out the ride and less body roll when trucks pass me so it helps with sway. But I just took a trip down I95 through SC and the road was terrible. I mean SCDOT should be ashamed. Especially any bridges - even small ones over creeks - the dips and ramps before and after the bridges were terrible. You felt like you were being launched off of a ramp. This is where these things really did their job. They kept the contents of the trailer from being tossed and kept the trailer tracking well and immediately dampened bounce and porpoising. I also installed front axle Sumo springs SSF-302-47 and rear axle Sumo Springs SSR-312-54 on my 2022 Ram 2500 and again - noticeable difference immediately in the smoothness of the ride while towing. I bought the heavier weight springs and was worried about the stiffness of the ride with no trailer - and there is stiffness - but man am I glad I had them on the Interstate going through SC. Before I got them I could feel my suspension bottom out front and rear in certain situations. Now - not a problem. You'll have to be ok with a stiffer ride when not pulling a trailer - but you'll be happy you have them during stressful highway driving. I keep a lot of weight on my truck even without a trailer - bed cap, bed slide, tools and other items so that helps with the stiffness when not towing. I also installed the spacer on the truck rear Sumo Springs so they are engaged all the time. Not installing the spacers may help with the stiffness. I may take my spacers out. Easy installation for the most part. I did it with 2 jacks and a jack stand. The trailer Sumo Springs were even easier than the truck springs. Just be aware that these springs - IMO - are not to improve the comfort of your truck ride in general but more to improve the performance of your truck while under significant load. Having said that, they did help a lot with body roll while cornering with no trailer which was kind of a nice bonus. The rear springs also helped with squatting under the hitch weight of the trailer. You may also notice on the trailer spring picture that the gas line had to be re-routed a bit - there's a kit that comes with the springs that makes that very easy - you're able to use the existing holes.

Fast and easy install. Have kept my travel trailer’s cheap China leaf springs from re-shaping themselves into an ‘n,’ from the factory ‘u’ shape. Highly Satisfied!