Shimano 21 Hole RS81 C35 Rim ETRTO 622-15

 

Shimano RS81 replacement rim

The rims are alloy with a carbon fibre laminate overlaid to increase stiffness without adding much in the way of weight, and bring the depth up to the 35mm implied by the name.

21 hole

ETRTO 622X15c

New old stock and may have marks from storage and transportation