BackcountryNew · Checked Nov 4, 2026, 5:33 AM
$605.00In stockVisit store
Brakes
Shimano Ultegra ST-R8170 Di2 12-Speed Shift/Brake System Black, Rear
Rear Brake System
Package contents
Included Components
- Shimano Shimano ST-R8170 Right Control · Factory Included Control
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
Where to Buy
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Competitive CyclistNew · Checked Nov 4, 2026, 4:31 AM
$605.00In stockVisit storeTechnical data
Specifications
- Supported brake control interfaces
- Hydraulic Mineral Oil
- Supported positions
- Rear
- Brake mount
- Flat Mount
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
- Sep 1, 2026
- Compatibility review
- Reviewed Sep 1, 2026
Approved technical sources
- Shimano North America official dealer package reference
- dealers.bike.shimano.com/product/1292863/shimano-cycling-st-r8170-ultegra-di2-shift-leverManufacturerSource checked Sep 1, 2026Evidence reviewed Sep 1, 2026
- Shimano brake specification handbook
- productinfo.shimano.com/pdfs/product/latest/Specifications_en.pdfManufacturerSource checked Sep 1, 2026Evidence reviewed Sep 1, 2026
- Exact package-content browser review
- backcountry.com/shimano-ultegra-st-r8170-di2-shift-brake-systemRetailerSource checked Sep 1, 2026Evidence reviewed Sep 1, 2026
- backcountry exact Shimano package
- backcountry.tnu8.net/c/7664279/1942899/5311RetailerSource checked Sep 1, 2026Evidence reviewed Sep 1, 2026
- competitive-cyclist exact Shimano package
- competitivecyclist.g39l.net/c/7664279/1965080/5416RetailerSource checked Sep 1, 2026Evidence reviewed Sep 1, 2026