Shimano XT Rear Derailleur
Best drivetrain upgrade for aggressive trail riders seeking reliable, quiet shifting.
This is the gold standard for trail riders who prioritize reliability over flashy, lightweight materials. Its tucked-in profile and chain stabilization turn chaotic, rocky descents into silent, precise gear changes. You sacrifice a few grams for a drivetrain that simply refuses to quit when the terrain gets ugly.
$118.99
at
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Shimano XT RD-M786-GS
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Shimano XT RD-M8000-GS
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Shimano XT FD-M8100-E Front Derailleur
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Shimano XT FD-M8070 Di2 Front Derailleur
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Shimano Deore XT RD-M8250-GS Di2
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Shimano XT RD-M8000-SGS
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Shimano Deore XT RD-M8250-SGS Di2
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$62.00
Shimano XT FD-M8100-D
$59.00
Shimano Deore XT RD-M8150
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Shimano Deore XT RD-M8250-SGS Di2
$570.00
Shimano XT RD-M786-SGS
$124.99
Shimano XT RD-M8000 Rear Derailleur
$65.95
Shimano XT Di2 M8070
$119.99
Shimano Deore XT M8130
$134.99
Shimano XT M8100-M Front Derailleur
$46.99
Shimano XT Di2 M8250
$570.00
Shimano STEPS Deore XT M8150
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Shimano XT M8100 Front Derailleur
$55.30
Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur
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Shimano Deore XT Di2 RD-M8150 Rear Derailleur
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Who it's for
- Aggressive riders needing reliable shifting under high torque
- Mountain bikers tackling rough, technical terrain
- Performance-focused cyclists balancing durability and weight
Who should skip it
- Riders wanting the massive range of 1x drivetrains
- Weight-obsessed racers seeking the lightest possible components
- Budget-conscious cyclists prioritizing value over top-tier performance
Performance breakdown
Shift Precision
Crisp, immediate gear changes even under heavy pedaling loads.
Chain Stability
Clutch mechanism effectively eliminates chain slap on technical, rocky descents.
Durability
Robust construction withstands the inevitable scrapes of aggressive trail riding.
Weight Efficiency
Balances lightweight materials with the strength required for mountain biking.
Impact Protection
Low-profile geometry keeps the derailleur tucked safely away from obstacles.
Drivetrain Versatility
Optimized specifically for 2x12 setups, offering a wide gear range.
Key Specs
Drivetrain Speeds
12
Cage Length
Long
Mount Type
Shimano Rear Direct Mount
Chain Wrap Capacity
45 teeth
Largest Cog
45 teeth
Weight
284 g
Compatibility
2x12 MTB drivetrains
Model Number
IRDM8120SGS
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