{"product_id":"shimano-st-r8170-right-lever-wbr-r8170-front-disc-brake","title":"Shimano ST-R8170 Right Lever W\/BR-R8170 Front Disc Brake","description":"The Shimano Ultegra ST-R8170 right lever paired with the BR-R8170 front hydraulic disc brake caliper delivers race-proven braking performance and wireless Di2 electronic shifting in one refined package - ideal for riders building or upgrading to a full Ultegra R8100 Di2 disc groupset. In the Australian setup, the right lever controls the front brake.\u003cbr\u003eHighlights\u003cbr\u003e- \u003cstrong\u003eUltegra R8100 Di2 platform:\u003c\/strong\u003e 12-speed wireless electronic shifting eliminates cockpit cables for a cleaner, more aerodynamic setup.\u003cbr\u003e- \u003cstrong\u003eServowave braking:\u003c\/strong\u003e Progressive lever feel that brings pads to rotor contact quickly, then multiplies power sharply - excellent modulation across the full stroke.\u003cbr\u003e- \u003cstrong\u003eHydraulic confidence:\u003c\/strong\u003e Shimano mineral oil hydraulic actuation delivers consistent, fade-resistant braking in all conditions.\u003cbr\u003e- \u003cstrong\u003eBR-R8170 flat mount caliper:\u003c\/strong\u003e Redesigned two-piston caliper with increased pad clearance for quieter operation and improved initial braking response.\u003cbr\u003e- \u003cstrong\u003eL03A Resin Ice-Tech pads:\u003c\/strong\u003e Finned resin pads with Ice-Tech heat-management for sustained braking performance on long descents.\u003cbr\u003e- \u003cstrong\u003eOne-Way Bleeding:\u003c\/strong\u003e Separated bleed nipple and opening screw streamline fluid maintenance and reduce air ingestion risk.\u003cbr\u003e- \u003cstrong\u003eEasy Hose Joint System (J-Kit):\u003c\/strong\u003e Simplifies hose installation and replacement without specialist tools.\u003cbr\u003e- \u003cstrong\u003eReach adjust:\u003c\/strong\u003e Fine-tune lever position across a wide range to suit any hand size or riding style.\u003cbr\u003e- \u003cstrong\u003eLong-life Di2 battery:\u003c\/strong\u003e CR1632 coin cell powers wireless shifting electronics with an estimated 1.5-2 year service life.\u003cbr\u003eWireless Di2 Electronic Shifting\u003cbr\u003eThe ST-R8170 integrates Shimano's latest wireless Di2 platform, removing shift cables from the cockpit entirely. Gear changes are delivered via electronic signal - fast, precise, and repeatable under any load or condition. The lever body is constructed from carbon fibre reinforced polymer (CFRP) for a light, rigid feel, with an aluminium brake blade for durability. The lever also supports wired Di2 configuration via EW-SD300 cables if required by the build.\u003cbr\u003eServowave Hydraulic Braking\u003cbr\u003eServowave technology gives the ST-R8170 its distinctive feel: initial lever travel brings the pads to the rotor quickly with minimal effort, then mechanical advantage increases sharply as braking force is applied. The result is superb modulation - precise speed scrubbing in the initial stroke, with maximum stopping power available when needed. The BR-R8170 caliper has been redesigned with a mono-body construction that increases pad clearance, reducing contamination noise while maintaining exceptional power and feedback.\u003cbr\u003eMaintenance \u0026amp; Serviceability\u003cbr\u003eThe BR-R8170 uses Shimano's One-Way Bleeding system, which separates the bleed nipple from the opening screw for a cleaner, more reliable fluid maintenance process. The Easy Hose Joint System (J-Kit) makes brake hose installation and replacement straightforward. The L03A Resin Ice-Tech pads are a readily available consumable; the caliper is also compatible with K03S resin and 04C metal pads.\u003cbr\u003eCompatibility \u0026amp; Fit\u003cbr\u003eDesigned for Shimano Ultegra R8100 Di2 12-speed groupsets. The BR-R8170 caliper uses flat mount fixing and is supplied configured for front wheel use. Compatible with Shimano mineral oil only - do not use DOT fluid. Pairs with SM-BH90 series brake hose (included via J-Kit). Compatible with 140mm or 160mm rotors; Shimano recommends RT-MT800 series rotors for full Ice-Tech heat-management benefits. In the Australian setup, the right-hand lever controls the front brake.","brand":"Shimano","offers":[{"title":"Default Title","offer_id":43497199009905,"sku":"FP_127201","price":549.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/4704\/4721\/files\/MediumProduct_RQRLPHScreen_705981.jpg?v=1782029728","url":"https:\/\/pedalheads.com.au\/products\/shimano-st-r8170-right-lever-wbr-r8170-front-disc-brake","provider":"Pedalheads ","version":"1.0","type":"link"}