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The ISM PN 2.1 is a triathlon version of the road-focused PN 1.1. It features the same 110mm width and maximum padding. The PN 2.1 has a rear triathlon transition hook, and upgraded Chromoly rails.

• The ISM PN 2.1 is a triathlon version of the road-focused PN 1.1. It features the same 110mm width and maximum padding. The PN 2.1 has a rear triathlon transition hook, and upgraded Chromoly rails.
• Nose-less design removes pressure from soft tissue, ensuring maximum blood flow, no genital numbness, and a healthier, more enjoyable ride
• 40-series foam-and-gel padding
• Maximum thigh and hamstring clearance
• PN chassis with an added rear transition hook