RockShox BoXXer C1 Upper Crown
Best replacement part for dedicated downhill mountain bike racers.
This replacement crown allows for precise geometry adjustments, letting riders dial in their front-end handling. It is a critical component for optimizing steering responsiveness and stability on technical downhill terrain.
$140.99
More BoXXer options
Who it's for
- Downhill racers seeking a factory-spec replacement for their suspension system
- Aggressive riders demanding precise steering response on technical terrain
- Performance-focused cyclists looking to fine-tune their bike's front-end handling
Who should skip it
- Riders with older fork models requiring more versatile hardware options
- Budget-conscious mountain bikers looking for more affordable replacement parts
- Home mechanics without specialized tools or advanced suspension knowledge
Performance breakdown
Structural Rigidity
Forged aluminum construction provides exceptional stiffness under heavy downhill loads.
Geometry Adjustability
Precise offset options allow riders to dial in steering responsiveness perfectly.
Installation Ease
Requires specific tools and mechanical knowledge for proper fork alignment.
Weight Optimization
Balances necessary strength with weight savings for competitive racing setups.
Component Compatibility
Seamless integration with standard 35mm BoXXer stanchion assemblies.
Manufacturing Precision
Tight tolerances ensure zero play and consistent handling on technical terrain.
Key Specs
Part Type
Upper Crown
Stanchion Diameter
35 mm
Offset
10 mm
Total Offset (on 27.5)
46 mm
Compatibility
27.5 inch wheels
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