Should SumoSprings Have Preload With Vehicle Unloaded
Published 09/01/2021
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Question:
I just install the 2800lb yellow sumo springs on my 2012 Tundra to help with pulling a 33ft Travel trailer. Hitch weight 900lbs. Does the job well. However unloaded my truck sits directly on the sumo therefore there is a stiffer ride. My question is do the shocks still engage to help with absorbing bumps in the road? Does the sumo compression enough that the shocks are engaging? If so I wont worry about it. If not should i but a rear shock like a Bilstein 5100 that will give me another one inch? Or should I get a softer Sumo?
asked by: Mark H
Expert Reply:
According to the folks at SuperSprings, there should be a 1/2 to 1-1/2 inches of preload on an unloaded vehicle, so its likely that the suspension on your truck has worn to a small degree over the years.
SuperSprings tells me that if the unloaded ride is more firm than you'd like, it's perfectly acceptable to trim a half inch or so from the springs. Doing so will not cause any harm to the springs and you'll get a less firm ride when the vehicle is unloaded. This won't affect the loaded ride quality.
New shocks would likely return your vehicle to a point where it's close to the original ride height, and there is also a lower rated SumoSpring, part # SSR-610-40 what would be a bit less stiff.
Since the shocks on your truck are almost 10 years old and likely in need of replacement anyway, that's where I'd recommend starting.
Product Page this Question was Asked From
SumoSprings Solo Custom Helper Springs - Rear Axle
- Vehicle Suspension
- Towing/Load Leveling
- Bump Stops
- Suspension Only
- Standard Duty
- Rear Axle Suspension Enhancement
- SuperSprings Intl
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