FSA ABS Oval Chainrings 4&5x110BCD 39T - Black NLS

- Fits all FSA ABS (asymmetric bolt spacing) cranks like the Gossamer, SL-K, and K-Force, including both 4 & 5 bolt designs (while only utilizing 4 bolts)\n- For Gossamer - use original FSA bolts and spacers; for SL-K - use original FSA bolt covers and bolts; for K-Force - must use Absolute Black bolt covers, purchased separately\n- Inner and outer oval chainrings are optimized with smooth shifting in mind\n- Features smooth angled surfaces, (6) up-shifting ramps (outer ring), and (12) down-shifting 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- Compatible with 10/11/12sp and Di2\n- Designed in UK, manufactured in Poland\n- Third party online retailers must be preapproved by manufacturer