You are in the freewheel protectors for Trial and Biketrial bicycles.
Protector Ring from Comas brand. Made in aluminium 7075-T6 and red anodised. Designed for right and left hand riders. Very light and strong. Suitable for 18, 17 and 16 teeth freewheels. 3mm width. 16 grams of weight.
Brand: COMAS
