Just like your suspension, elastomers do need to be freshened up. We recommend changing your elastomers yearly to be sure your Flexx Handlebars are performing as intended. Riders that weigh less than 150lbs or those riding smoother trails (or gravel grinding) prefer the red compression elastomer with either a red or yellow rebound elastomer. Yellow rebound elastomers provide a more traditional, solid feel when pulling back on the bar. The orange elastomers are stiff, mostly reserved for larger, or more aggressive down hill riders. It's all personal preference, but with a little testing you can easily tailor the bar to your needs. We're happy to discuss your elastomer needs with you, please shoot us a call or email to do so.