Is Shimano DEORE SHIFT LEVER RIGHT I-SPEC EV 12s compatible with Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)?

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Not Compatible

high confidence

Issues found between Shimano DEORE SHIFT LEVER RIGHT I-SPEC EV 12s and Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)

Notes & Caveats

  • Front speed mismatch: DEORE SHIFT LEVER RIGHT I-SPEC EV 12s (3x) 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 DEORE SHIFT LEVER RIGHT I-SPEC EV 12s (3x)

Part A

Shimano DEORE SHIFT LEVER RIGHT I-SPEC EV 12s

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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 DEORE SHIFT LEVER RIGHT I-SPEC EV 12s with Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)?

No — Shimano DEORE SHIFT LEVER RIGHT I-SPEC EV 12s and Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) are not compatible. Front speed mismatch: DEORE SHIFT LEVER RIGHT I-SPEC EV 12s (3x) 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 DEORE SHIFT LEVER RIGHT I-SPEC EV 12s (3x) Always confirm the exact specs before buying.

Do Shimano DEORE SHIFT LEVER RIGHT I-SPEC EV 12s 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 DEORE SHIFT LEVER RIGHT I-SPEC EV 12s 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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