Sumo Springs on 2022 F350 SRW

Both serve a different operation.
Bump stops will stop the rear suspension from solid steel contact at full compression.

Sumosprings replace the bump stops but their job acts like a upper aux over load spring pack. They can be set up to only make contact after so much load and progressively stiffen....or set up to contact with no load.

Sounds like the OP was sent the wrong springs or they were ordered wrong.

I use them on the wifes 1500 chevy pulling 10k and 12k car haulers. Works great.

I have around 900 miles of towing on mine and they show no signs of wear...just looked. They appear to make contact the same as the factory stops. They eliminate my squat and provide a very smooth ride. I have a '22 F250.
Interested in what you find out!!

Thanks for the reply, because I wasn't sure if there was some kind of rebound damping like a shock absorber.

Fj12ryder - yes. Bigger and spongeeer bump stops that eliminate a couple inches of squat…unless they tear off like mine did…

Just curious, but aren't Sumosprings just glorified bump stops?