# CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600 — Bike drivetrain and groupset compatibility

For CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600, manufacturer is SHIMANO; component type is cassette; speeds is 10; pairs with is HG spline L; condition is Need 1.85 mm low spacer and 1.0 mm spacer, recorded from its source on 2026-08-11.

- **Manufacturer:** SHIMANO _(our reading, not quoted from the source)_
- **Component:** CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600 _(verified: appears in the quote below)_
- **Component type:** cassette _(our reading, not quoted from the source)_
- **Speeds:** 10 _(our reading, not quoted from the source)_
- **Pairs with:** HG spline L
- **Condition:** Need 1.85 mm low spacer and 1.0 mm spacer _(verified: appears in the quote below)_

## What the source says

> *2 Need 1.85 mm low spacer and 1.0 mm spacer for the cassette below. CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600 (1.0 mm spacer is included)

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Pairs with

productinfo.shimano.com says pairs with is **HG spline L**, as of 2026-08-11.

> *2 Need 1.85 mm low spacer and 1.0 mm spacer for the cassette below. CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600 (1.0 mm spacer is included)

Source: https://productinfo.shimano.com/pdfs/product/archive/2025-2026_Compatibility_v037_en.pdf

productinfo.shimano.com says pairs with is **HG spline M**, as of 2026-08-11.

> *5 Need 1.0 mm spacer for the 10-speed ROAD cassettes below. CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600

Source: https://productinfo.shimano.com/pdfs/product/archive/2025-2026_Compatibility_v037_en.pdf


### Condition

productinfo.shimano.com says condition is **Need 1.85 mm low spacer and 1.0 mm spacer**, as of 2026-08-11.

> *2 Need 1.85 mm low spacer and 1.0 mm spacer for the cassette below. CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600 (1.0 mm spacer is included)

Source: https://productinfo.shimano.com/pdfs/product/archive/2025-2026_Compatibility_v037_en.pdf

productinfo.shimano.com says condition is **Need 1.0 mm spacer**, as of 2026-08-11.

> *5 Need 1.0 mm spacer for the 10-speed ROAD cassettes below. CS-7900 / CS-7800 / CS-6700 / CS-6600 / CS-5700 / CS-5600

Source: https://productinfo.shimano.com/pdfs/product/archive/2025-2026_Compatibility_v037_en.pdf


## Source

- https://productinfo.shimano.com/pdfs/product/archive/2025-2026_Compatibility_v037_en.pdf

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Bike drivetrain and groupset compatibility](https://referencesource.org/bike-drivetrain-groupset-compatibility/).