Traxxas package of progressive rate shock springs are constructed of steel. White in color. Under light duty driving the progressive rate springs soak up small bumps. As the jumps get bigger these springs get firmer the more the suspension is compressed.
INCLUDES: Four white progressive rate front or rear shock springs
One instruction sheet
Ultra shocks from Traxxas
Length: 3" (76.2mm)
These have a nice bounce to them when using heavier weight oils. If you stick to a 35 or 40 wt oil it will be about perfect, depending on what preload clips you have on.