Alpinestars Nucleon KR-CiR Chest Protector Black

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The Alpinestars Nucleon KR-CiR Chest Protector is a high performance, lightweight track and race chest protector. It is designed to be slipped inside your race suit before you zip up and be held in place by the fit of the suit. The base material used for the KR-CiR Chest Protector becomes more moldable and flexible as it warms which makes it comfortable to wear under the suit. Alplinestars put a plate in the center of the protector that is harder that the base material around it to help spread the load of an impact out to increase safety. This plate also has silicone grip feature to help hold the protector in place while riding. To preserve the airflow of your suit it is fully perforated. If your suit fits loose in the chest area we recommend you purchase a chest protector with straps like the Alpinestars Nucleon KR-C Chest Protector or the Alpinestars Track Vest 2.


  • Perfect combination with the KR-R back protector for maximum protection.
  • Certified Level 2 to prEN 1621-3:2013.

Alpinestars Nucleon Chest Protector Size Chart

Alpinestars Nucleon Chest Protector Size Chart