Ride with minimal chain slap by using a Chainstay Protector. Designed and made in our Utah facility, the Chainstay Protector is made with neoprene and sewn with a tight stitch and heavy-duty thread for extra strength and durability. Lizard Skins chainstay guards are the original, strongest and lightest protectors on the market since 1993. Features: New sizing system for 26, 27.5, and 29 inch wheeled frames All sizes available in black, blue and red 280 mm in length. Size medium is 27 grams and fits a circumference of 100-125mm.