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Shimano DuraAce 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 & Pioneer, SRM and other power meters \n Inner and outer oval chainrings are optimized with smooth shifting in mind \n Features smooth angled surfaces, (6) upshifting ramps (outer ring), and (12) downshifting points (outer ring) \n Oval rings help the rider to spin smoother and more efficiently \n Example: 32t is equivalent to 30t at dead spot and 34t at the power zone \n Works with 2x chainring systems and does not require any modification to the front derailleur for use \n Designed in UK, manufactured in Poland
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🇺🇸 Ship from USA · On Agora since 2026
$65.95