# RD-M9250 / RD-M8250 / RD-M6250 — Bike drivetrain and groupset compatibility For RD-M9250 / RD-M8250 / RD-M6250, manufacturer is SHIMANO; component type is rear derailleur; speeds is 12; pairs with is all crankset for 12-speed with 55 mm chain line, recorded from its source on 2026-08-11. - **Manufacturer:** SHIMANO _(our reading, not quoted from the source)_ - **Component:** RD-M9250 / RD-M8250 / RD-M6250 _(verified: appears in the quote below)_ - **Component type:** rear derailleur _(our reading, not quoted from the source)_ - **Speeds:** 12 _(our reading, not quoted from the source)_ - **Pairs with:** all crankset for 12-speed with 55 mm chain line _(verified: appears in the quote below)_ ## What the source says > RD-M9250 / RD-M8250 / RD-M6250 are compatible with all crankset for 12-speed with 55 mm chain line. ## 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/).