Shimano FC-R8100 Chainring

Shimano inner / outer chainring for the named series crankset — the replacement tooth ring you swap when the teeth are worn down to the point where shifting gets rough or the chain starts slipping under load. Sold as the specific tooth-count variant matching your crankset configuration; not a complete crankset. Ultegra is Shimano's second-tier road groupset — approximately 95% of Dura-Ace performance at a materially lower price and weight cost. Standard on high-end consumer road bikes. This is the Shimano FC-R8100 Chainring.