USA Fluid does TWO things. 1) Lubrication of the tire and rim for damage free installation. 2) Corrosion prevention preservative on surfaces that remains and protects where the rubber and rim are locked together. Without USA Fluid you use the soap and water which puts caustic material on surfaces that creates corrosion of the rim and rotting of the rubber over time. NOBODY THINKS About That !! But We Do here at USA Fluid !! NO DETAIL IS TOO SMALL !!!