Shimano Ultegra RD-X805 Di2
Best high performance upgrade for dedicated road cycling enthusiasts.
This component brings mountain bike-inspired chain stabilization to drop-bar setups, ensuring consistent, reliable shifting across rough and technical terrain. It integrates seamlessly with existing electronic road controls, offering precise, rapid gear changes while minimizing chain slap on uneven surfaces.
$284.99
at
WD Bicycles
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Who it's for
- Performance-oriented road cyclists seeking flawless gear transitions under load
- Busy riders who prefer spending time on the road over tuning
- Tech-savvy enthusiasts wanting a bespoke control layout for their drivetrain
Who should skip it
- Forgetful long-distance tourers who might overlook charging their components
- Budget-conscious commuters looking for the most cost-effective replacement parts
- Criterium racers frequently exposed to high-speed crashes and equipment damage
Performance breakdown
Shift Precision
Electronic actuation delivers flawless, consistent gear changes every single time.
Chain Security
The clutch mechanism effectively eliminates chain slap on aggressive, uneven terrain.
Durability
Low-profile architecture significantly reduces vulnerability during off-road impacts and crashes.
Setup Complexity
Di2 integration requires careful wiring but simplifies long-term maintenance significantly.
Terrain Versatility
Switchable stabilizer allows quick adaptation between smooth pavement and rough gravel.
Gear Range
Long cage accommodates wide cassettes, perfect for tackling steep, unpaved climbs.
Key Specs
Drivetrain Speeds
11
Cage Length
Long
Max Rear Cog Teeth
34t
Total Capacity
39t
Mount Type
Direct mount
Shifting Type
Electronic
Derailleur Position
Rear
Electronic Protocol
Shimano Di2
Know before you buy
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