Brakes
Shimano Tiagra BR-4770 Brake Caliper
Rear flat-mount caliper
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
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Technical data
Specifications
- Supported brake control interfaces
- Hydraulic Mineral Oil
- Compatible brake hoses
- Sm-Bh90-J-Ssr, Sm-Bh90-Jk-Ssr
- Compatible rotor models
- Sm-Rt64
- Brake pad materials
- Metal, Resin
- Brake pistons
- 2
- Supported positions
- Rear
- Brake mount
- Flat Mount
- Supported rotor diameters
- 140 mm, 160 mm, 180 mm
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
- Jul 28, 2026
- Compatibility review
- Reviewed Jul 28, 2026
Approved technical sources
- Shimano Tiagra hydraulic disc-brake specification
- productinfo.shimano.com/en/spec/road-brake-hydraulic-disc-brakeManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano brake caliper and rotor compatibility C-461
- productinfo.shimano.com/en/compatibility/C-461ManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano hydraulic systems compatibility C-499
- productinfo.shimano.com/en/compatibility/C-499ManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano package-code and label reference
- si.shimano.com/pdfs/compliance/pmi/Packaging%20Labelling%20Information_Italy_BC_20231016.pdfManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026