Sumo Springs/ Timbren

[Bruce.S]

Has anyone had any experience with Timbren or Sumo Springs on their tow vehicle? They replace the factory bump stops and are supposed to prevent rear end “sag“.
Any advice based on experience would be welcome.

[scott05]

I have Timbrens installed on my GMC 2500. I installed them to level the ride when we use our Hallmark truck camper. Our set up doesn't allow us to tow the airstream with the Hallmark loaded, which we never intended anyway. I did find that when towing the airstream I needed to adjust the hensley hitch so that the timbrens are engaged but not carrying all the weight. Too much weight seems to make the ride bouncy. Easy adjustment with the hensley. I also changed the stock shocks to bilsteins and with the combination I am very happy with the setup. No proposing and a smooth ride.

[JennyJakeNH]

We’ve used Sumosprings on both a F150 and F250. We saw a huge benefit on the F150 in reducing bouncing. On the F250, the impact was not as noticeable.

[AKmtnpilot]

Had Sumo Springs installed on my 2019 Ram 1500. 1500# models. Took the slight sag away and just slightly better hitting bumps and dips. Same unloaded. Towing a 2019 25 Globetrotter.

[Kcdaniels]

We had the Timbrens on our Dodge 1500....did help with sag but we found they made the ride too stiff.....took them off and installed airbags....for us was much better ride when towing....
That said we sold the dodge and now own a f250 super duty

[djb75]

Sumos were tremendous for us twice. The first use was on our Navion Class C - greatly reduced the rolling motion every time we went over a curb. And they smoothed out the ride on our F250 so that it didn't feel like we were going airborne every time we hit a washboard road.
Easy installation and a great investment in our ride.

[FMSports]

RAM 1500 2015 with GT 27FBT, Blue Ox hitch. Just installed some Timbrens and went on a test drive. Did NOT like them and going to remove, going back to stock.

Problems with these are:
1. Jiggly ride, as the RAM sinks to contact at anything over say 400lb TW
2. They PREVENT the Blue Ox WDH from transferring weight, because they prevent the tow ball from dropping. So I was at 21" ball height with less weight on my front axle.
3. They changed the handling balance of the truck. So the rear end is stiff, raised up and the front compliant, worse for sway/dynamics imo. Raised the COG.

The setup looks better, but that is where it ends! Off they come and heading back to Timbren!