Zipp Freehub Body Spacer

No, these spacers are specifically engineered for Zipp 188 rear hubs. They are not designed to be universal and may not provide the correct fit or tolerance for other hub models.

Yes, these spacers are essential when running 9 or 10-speed cassettes on an 11-speed compatible freehub body. They take up the extra space on the freehub to ensure your cassette lockring tightens down securely without any play.

The two-pack provides flexibility for different drivetrain configurations. Depending on your specific cassette and hub setup, you may need one or both spacers to achieve the correct spacing and alignment.

If your drivetrain noise is caused by a loose cassette or improper spacing, these spacers can certainly help. However, they are not a catch-all solution for drivetrain noise, which can also stem from worn chains, misaligned derailleurs, or damaged cassette teeth.

Generally, the spacer should be placed on the freehub body first, followed by the cassette. Always consult your specific cassette manufacturer's installation guidelines to confirm if additional spacers are required beyond what the hub itself needs.