Realizzazione Corone per Strada e Mtb
for Sram XX1- XØ1  11 speed 10/42 cassettes original 42teeth cog can be replaced with ARI 39teeth cog without any additional modification on your bike this new project is created to meet the needs of cyclists who practice cyclocross and road in monoring configuration 42teeth cog in these two fields forces with a too agile pedaling, often not usable with efficacy studied for roadies and 'crossers 39teeth permits a more regular and easily usable scale  replacement is easy and fast  material used is hard anodized ERGAL 7075T6  all range of colours is available in the colours table  weight of 39teeth cog is 77 grams
peso pignone originale XX1 42T 39T ARI COG FOR SRAM XX1 AND X1 CASSETTE
39T Ari Cog as spare/upgrade
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cod. 298 € 90.00