How Much Preload Should SumoSprings kit for Trailer Suspension Have When Installed

Updated 06/24/2020 | Published 06/23/2020

Question:

Hi, I have a Sumo Spring #TSS-107-40 kit. Once installed, there is roughly an inch of preload. Is that too much preload. or are Timbren products better for what I need. The RV trailer is 18 feet long, and a maximum total weight is 4100 pounds. Empty it is 3400 pounds. Thanks

asked by: Stan H

Expert Reply:

One inch of preload is too much for the install of the SumoSprings kit part # TSS-107-40 that you referenced. You want between 1/4 and 1/2 inch of preload otherwise you'll have a harsher ride quality. If you have spacers installed you would need to remove them so that the preload lowers. This process is outlined in the attached install instructions link.

expert reply by: Jameson C