The series of stainless steel rear sprocket has been selected as best product available on market. We personally try all products on our bikes and we can ensure that the rear sprockets in catalogue are manufactured with raw materials of exceptional quality and they have been treated with superficial thermal processes of cementation, for the perfect reliability, strength and durability.
Steel rear sprocket 42D. (standard for 990ADV, 1050ADV, 1090ADV, 1190ADV e 1290ADV.)
Depending on the availability steel rear sprocket may have drawing and color different than those in the pictures.
The installation of rear sprocket 44D. and 45D. also requires the replacement of the chain.