Is Shimano GRX BRAKE LEVER 1X12s RX610 compatible with Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)?

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Not Compatible

high confidence

Issues found between Shimano GRX BRAKE LEVER 1X12s RX610 and Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)

Notes & Caveats

  • Front speed mismatch: GRX BRAKE LEVER 1X12s RX610 (2x) is not compatible with GRX REAR DERAILLEUR 12s (FOR 11-34/36T) (1x)
  • Front speed mismatch: GRX REAR DERAILLEUR 12s (FOR 11-34/36T) (1x) is not compatible with GRX BRAKE LEVER 1X12s RX610 (2x)

Part A

Shimano GRX BRAKE LEVER 1X12s RX610

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Part B

Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)

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Frequently Asked Questions

Can I use Shimano GRX BRAKE LEVER 1X12s RX610 with Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)?

No — Shimano GRX BRAKE LEVER 1X12s RX610 and Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) are not compatible. Front speed mismatch: GRX BRAKE LEVER 1X12s RX610 (2x) is not compatible with GRX REAR DERAILLEUR 12s (FOR 11-34/36T) (1x) Front speed mismatch: GRX REAR DERAILLEUR 12s (FOR 11-34/36T) (1x) is not compatible with GRX BRAKE LEVER 1X12s RX610 (2x) Always confirm the exact specs before buying.

Do Shimano GRX BRAKE LEVER 1X12s RX610 and Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) use the same number of speeds?

Yes, both are 12-speed components. Matching the speed count is the single most important drivetrain requirement — the cassette spacing and cable pull are designed around it.

Are Shimano GRX BRAKE LEVER 1X12s RX610 and Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) the same shifting type?

Yes, both are mechanical (cable-actuated). The cable pull ratio must still match between brands and generations for precise shifting.

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