These are the optional Hard Front Shock Springs for the DuraTrax DXR500 Motorcycle. FEATURES: Steel construction Provides a firmer dampening rate than stock springs Replaces the stock shock springs in key #14 INCLUDES: Two Hard Front Shock Springs REQUIRES: Installing over front shocks following instructions in manual COMMENTS: Also available in the following dampening rates; Stock, DTXC4810 Soft, DTXC4811 jxs 06/02/11 ir/jxs