Jenson USANew · Checked Nov 4, 2026, 3:23 AM
$75.00In stockVisit store
Rear derailleurs
Shimano GRX RD-RX400 Rear Derailleur
Mechanical 2×10 · 32-36T
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
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Technical data
Specifications
- Speeds
- 10-speed
- Supported speeds
- 10-speed
- Maximum cassette cog
- 36T
- Smallest cassette cog
- 11T
- Supported cassette combinations
- 11-32t, 11-34t, 11-36t
- Supported front chainrings
- 2
- Maximum front difference
- 16T
- Drivetrain family
- Shimano GRX mechanical 10-speed
- Compatible chain families
- Shimano HG-X 10-speed
- Shift actuation
- Mechanical
- Frame mounting
- Conventional hanger
- Total capacity
- 41T
Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Oct 6, 2026
- Compatibility review
- Reviewed Oct 6, 2026
Approved technical sources
- Shimano 2026 GRX component ordering catalog
- set.shimano.co.jp/bc_catalog/gravel.pdfManufacturerSource checked Aug 6, 2026Evidence reviewed Oct 6, 2026
- Jenson exact retail package confirmation
- jensonusa.com/shimano-grx-rd-rx400-rear-derailleur-2x10-speedRetailerSource checked Oct 6, 2026Evidence reviewed Oct 6, 2026