Shimano trickles hydraulic road disc brakes down to Tiagra-level

Road disc tech to accompany affordable 10-speed groupset

Following the release of Ultegra and 105 hydraulic disc brakes last year, today Shimano announced Tiagra-grade road hydraulic disc brakes to accompany its Tiagra 4700 10-speed group.

Related reading: Shimano updates Tiagra and introduces 105 hydraulic disc brakes

Shimano is typically conservative in its product offerings, catering to the OEM (original equipment manufacturer) market first and foremost.  This new product shows the strong demand for road disc brake bikes, especially at the entry-level. 

The Shimano Tiagra disc brakes (BR-RS405) feature flat-mount hydraulic calipers and a 10-speed mechanical shift lever. Shimano SM-RT81 brake rotors with ‘Ice Technology’ for heat dissipation complete the system.

Exact details are scarce, but the new brakes look to use plenty of trickle-down technology and familiar ergonomics. Like the newly updated Tiagra mechanical-brake shifters, these also won’t offer gear indicators. The new brake levers are claimed to feature up to 10mm of lever reach adjustment.

Available in flat-mount style only (road-specific, bolts from beneath), the new calipers appear to use a standard non-finned brake pad. Like all Shimano hydraulic disc brakes, these will continue to use mineral oil. Helping with a relatively easy setup, these will also feature Shimano’s ‘Funnel bleed’ system.

Related reading: Shimano Sora mechanical disc brakes launched

Shimano's current road disc offerings as of the 1st of april, 2016:
Shimano's current road disc offerings as of the 1st of april, 2016:
The current road disc range from Shimano

With the recent announcement of Sora-grade mechanical road disc brakes, the new Tiagra-grade hydraulic options brings the count up to four options from Shimano. Shimano’s top-tier groupset, Dura-Ace, is now the obvious standout lacking a disc brake option, it’s something we’d bet our houses on to happen soon.

Pricing and weights are still to be announced, but expect to see these new brakes appearing on shelves and 2017 bikes from as early as July.

David Rome

Editor, Australia
Having worked full-time within the cycling industry since 2006, Dave is a former editor of BikeRadar Australia. Riding and racing mountain, road and 'cross for over a decade, Dave's passion lies in the sport's technical aspects, and his tool collection is a true sign of that.
  • Discipline: Mountain, road and cyclocross
  • Preferred Terrain: Fast and flowing singletrack with the occasional air is the dream. Also happy chasing tarmac bends.
  • Current Bikes: Trek Fuel EX 27.5, SwiftCarbon Detritovore, Salsa Chilli Con Crosso
  • Dream Bike: Custom Independent Fabrications titanium, SRAM Etap and Enve wheels/cockpit
  • Beer of Choice: Gin & tonic
  • Location: Sydney, Australia

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