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compact sealed bearing
it also has a more versatile construction
When the temperature falls
With these bad boys hugging your feet
we surpass much of the alloy and carbon competition in the market
Shimano DURA-ACE R9100 Chainring Inner Choose:36 compact sealed bearingThe Shimano Dura Ace FC R9100 inner chainring is engineered for elite level power transfer and shifting precision. Its reinforced construction works in tandem with Shimanos unique asymmetrical four arm spider to maximize stiffness while minimizing weight. This 11 speed component is the benchmark for professional road racing performance. Crafted from high grade aluminum, the inner ring features optimized tooth profiles for smooth, reliable chain
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