Shimano XT RD-M8100-GS Rear Derailleur
Top Pick
Shimano
Shimano

Shimano XT RD-M8100-GS Rear Derailleur

4.7

Best durable performance for serious trail riders.

This derailleur prioritizes a quiet and smooth ride with its advanced chain management system. It offers precise shifting across a wide range of gears, making it a reliable choice for demanding trails. The robust construction ensures durability, while the low-profile design minimizes snags and impacts.

$145.00

In stock

at

Marblehead Cycle

Derailleur Position Rear
Front
Rear
Speed Compatibility 12
Shifting Type Mechanical
Electronic
Mechanical

More Deore XT options

Shimano XT RD-M786-SGS Rear Derailleur

Shimano XT RD-M786-SGS Rear Derailleur

$124.99

Shimano XT M8050 Di2 Rear Derailleur

Shimano XT M8050 Di2 Rear Derailleur

$415.00

Shimano XT FD-M785 Front Derailleur

Shimano XT FD-M785 Front Derailleur

$44.99

Shimano XT Rear Derailleur

Shimano XT Rear Derailleur

$118.99

Shimano XT CN-HG95 Chain

Shimano XT CN-HG95 Chain

$43.99

Shimano Deore XT Shadow + Rear Derailleur

Shimano Deore XT Shadow + Rear Derailleur

$100.00

Shimano Deore XT RD-M8120-SGS Derailleur

Shimano Deore XT RD-M8120-SGS Derailleur

$62.00

Shimano Deore XT Shadow Rear Derailleur

Shimano Deore XT Shadow Rear Derailleur

$129.99

Shimano XT M8100 Front Derailleur

Shimano XT M8100 Front Derailleur

$53.10

Shimano XT RD-M8100-SGS Rear Derailleur

Shimano XT RD-M8100-SGS Rear Derailleur

$145.00

Shimano XT RD-M8130-SGS Rear Derailleur

Shimano XT RD-M8130-SGS Rear Derailleur

$78.94

Shimano Deore XT RD-M8050-GS Rear Derailleur

Shimano Deore XT RD-M8050-GS Rear Derailleur

$415.00

Shimano XT M8000 Rear Derailleur

Shimano XT M8000 Rear Derailleur

$129.99

Shimano XT FD-M8100-D

Shimano XT FD-M8100-D

$59.00

Shimano XT M8100 Rear Derailleur

Shimano XT M8100 Rear Derailleur

$145.00

Shimano Deore XT Rear Derailleur

Shimano Deore XT Rear Derailleur

$97.99

Shimano Deore XT RD-M8260-SGS

Shimano Deore XT RD-M8260-SGS

$570.00

Shimano Deore XT RD-M8260-SGS

Shimano Deore XT RD-M8260-SGS

$570.00

Shimano Deore XT Di2 Front Derailleur

Shimano Deore XT Di2 Front Derailleur

$208.80

Shimano Deore XT FD-M785 Front Derailleur

Shimano Deore XT FD-M785 Front Derailleur

$42.99

Shimano Deore XT RD-M8260

Shimano Deore XT RD-M8260

$570.00

Shimano XT RD-M8100-GS

Shimano XT RD-M8100-GS

$163.13

Shimano XT RD-M786-GS

Shimano XT RD-M786-GS

$125.00

Shimano XT RD-M8000-GS

Shimano XT RD-M8000-GS

$145.82

Shimano XT FD-M8100-E Front Derailleur

Shimano XT FD-M8100-E Front Derailleur

$59.00

Shimano XT FD-M8070 Di2 Front Derailleur

Shimano XT FD-M8070 Di2 Front Derailleur

$290.00

Shimano Deore XT RD-M8250-GS Di2

Shimano Deore XT RD-M8250-GS Di2

$570.00

Shimano XT RD-M8000-SGS

Shimano XT RD-M8000-SGS

$130.00

Shimano Deore XT RD-M8130-SGS

Shimano Deore XT RD-M8130-SGS

$145.00

Shimano Deore XT RD-M8250-SGS Di2

Shimano Deore XT RD-M8250-SGS Di2

$570.00

Shimano XT FD-M8100-M Front Derailleur

Shimano XT FD-M8100-M Front Derailleur

$62.00

Shimano XT FD-M8100-D

Shimano XT FD-M8100-D

$59.00

Shimano Deore XT RD-M8150

Shimano Deore XT RD-M8150

$450.00

Shimano Deore XT RD-M8250-SGS Di2

Shimano Deore XT RD-M8250-SGS Di2

$570.00

Shimano XT RD-M786-SGS

Shimano XT RD-M786-SGS

$124.99

Shimano XT RD-M8000 Rear Derailleur

Shimano XT RD-M8000 Rear Derailleur

$65.95

Shimano XT Di2 M8070

Shimano XT Di2 M8070

$119.99

Shimano Deore XT M8130

Shimano Deore XT M8130

$134.99

Shimano XT M8100-M Front Derailleur

Shimano XT M8100-M Front Derailleur

$46.99

Shimano XT Di2 M8250

Shimano XT Di2 M8250

$570.00

Shimano STEPS Deore XT M8150

Shimano STEPS Deore XT M8150

$359.99

Shimano XT M8100 Front Derailleur

Shimano XT M8100 Front Derailleur

$55.30

Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur

Shimano Deore XT Di2 RD-M8150-12 Rear Derailleur

$409.00

Shimano Deore XT Di2 RD-M8150 Rear Derailleur

Shimano Deore XT Di2 RD-M8150 Rear Derailleur

$268.00

Who it's for

  • Mountain bikers seeking dependable and smooth gear transitions
  • Aggressive riders needing components that withstand demanding off-road use
  • Riders prioritizing a quiet drivetrain and secure chain management

Who should skip it

  • Elite racers and weight-obsessed riders seeking the lightest possible setup
  • Budget-conscious cyclists or casual riders not needing top-tier performance
  • Cyclists with existing non-12-speed or mixed-brand drivetrains

Performance breakdown

Shifting Precision

Hyperglide+ technology delivers crisp, reliable gear changes under heavy load.

Excellent

Drivetrain Silence

Shadow RD+ clutch effectively eliminates chain slap on rough, technical terrain.

Excellent

Durability

Rugged construction withstands aggressive trail abuse season after season.

Excellent

Weight Efficiency

Lightweight materials balance performance without sacrificing structural integrity.

Excellent

Installation Ease

Straightforward setup makes tuning and cable routing intuitive for home mechanics.

Excellent

Gear Range Versatility

Handles wide-range cassettes effortlessly for steep climbs and fast descents.

Excellent

Key Specs

Rear Derailleur Mount Type

10x1 Standard

Rear Der/Shifter Compatibility

Shimano Mountain

Color

Black

Cage Length

Long, Medium

Drivetrain Speeds

12

Largest Cog

45, 51

Weight

284

Chain Wrap Capacity (teeth)

41, 45

Know before you buy

Still have a question?

Ask Metto anything about the Shimano XT RD-M8100-GS Rear Derailleur before you decide.

Shimano XT RD-M8100-GS Rear Derailleur

Ready to buy?

Marblehead Cycle
Marblehead Cycle
In stock
$145.00
Buy
Cripple Creek Backcountry
Cripple Creek Backcountry
Out of stock
$144.99
Buy