The relative durometer (stiffness) of the elastomer is denoted by number of dots printed on the elastomer. Thudbuster ST comes with Soft, Medium, & Firm elastomers in the box, with Medium elastomer installed.

• Extra Soft - 1 Dot - Rider under 100lbs
• Soft (included) - 2 Dots - Rider weight 100lbs - 150lbs
• Medium (installed from factory) - 3 Dots - Rider weight 150lbs - 200lbs
• Firm (included) - 4 Dots - Rider weight 200lbs to 250lbs
• Extra Firm - 5 Dots - Rider weight 250lbs to 330lbs