Box One Prime 9 Rear Derailleur
Best reliable shifting for demanding trail riders.
This derailleur brings modern 1x advantages to a legacy 9-speed system. Its wide cage and adjustable clutch handle large cassettes, while forged construction ensures it can withstand tough trails.
$194.99
at
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Who it's for
- Aggressive trail riders seeking a resilient and long-lasting drivetrain.
- Riders prioritizing simple setup and consistent, trouble-free shifting.
- Mountain bikers needing broad gear ratios without complex multi-speed systems.
Who should skip it
- Performance-oriented riders accustomed to rapid, precise shifts of premium systems.
- Cyclists who prefer smaller gear increments for precise cadence control.
- Builders mixing and matching components from various manufacturers.
Performance breakdown
Chain retention
The Tri-Pack clutch keeps the chain secure over the roughest trails.
Drivetrain range
Wide-range 11-50T compatibility handles steep climbs with ease.
Build durability
Forged construction stands up to inevitable rock strikes and trail abuse.
Shift precision
Crisp indexing provides reliable gear changes under moderate pedaling loads.
Installation ease
Straightforward setup makes upgrading your 9-speed drivetrain a simple task.
Weight efficiency
Robust materials prioritize strength over shaving every possible gram.
Key Specs
Speeds
9-speed
Cage Length
Long Cage
Cassette Compatibility
11-50T
Material
Forged construction
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