Sinter Model 017 SRAM

The SRAM HRD road platform; Red 22, Force 22, Rival 22, CX1, Apex 1 hydraulic; is the previous-generation SRAM road hydraulic family, and a meaningful share of road and gravel bikes built between 2015 and 2019 still ride on it. The Sinter Model 017 is the organic-compound replacement for this caliper. The same pad shape also covers the Level TLM and Ultimate flat-mount monoblock calipers (pre-2018) and the current Red AXS flat-mount monoblock road caliper. One Sinter model number covers the SRAM road hydraulic span from 2015 forward.

What's in the kit

One caliper's worth of pads (2 pads, left and right) for the SRAM HRD road pocket. The kit ships with the spring, pin, and bedding-in instructions. Order two kits if you're replacing front and rear pads in the same service.

Fits

SRAM HRD road pad shape:

• SRAM Red 22 HRD
• SRAM Force 22 HRD
• SRAM Rival 22 HRD
• SRAM CX1 HRD
• SRAM Apex 1 HRD
• SRAM Level TLM and Ultimate (pre-2018, flat-mount monoblock variants)
• SRAM Red AXS (flat-mount monoblock road caliper)

The Red AXS flat-mount monoblock is a different caliper geometry from the flat-mount two-piece (which takes the Model 006); confirm which AXS caliper version your bike runs before ordering. The monoblock is the single-piece flat-mount caliper, identifiable by no center bolt joining the upper and lower caliper halves.

Compound and feel

Sinter's organic ceramic-loaded compound is the right pad for road-platform braking. Road riders work the brake in short, hard inputs interrupted by long no-input segments; the resin matrix bites cleanly off the lever, modulates predictably under heavy braking, and stays quiet on dry rotors. The HRD calipers and the monoblock AXS calipers both produce a slightly stiffer lever feel than the flat-mount two-piece SRAM AXS variant; Sinter's pad compound for the Model 017 fitment is tuned to that stiffer-lever feedback, so the bite-and-release pattern feels controlled rather than abrupt.

Specs

• Compound: organic (ceramic-loaded, resin-bound)
• Backing plate: steel
• Pad shape: SRAM HRD road / Level TLM monoblock / Red AXS monoblock
• Pads per package: 2 (one caliper)
• Includes spring and pin

Includes: 2 pads (left and right), spring, pin, bedding-in instructions.

Ljubljana since 1969

Sinter has been making friction materials in Ljubljana since 1969, and developed the first disc brake pads in the former Yugoslavia in 1972. The bicycle line draws on the same metallurgy that ships pads to motorcycle OEMs at scale. Unior has been forging hand tools in Zreče since 1919, and is the official technical partner of multiple World Tour and downhill teams. Euro Toolworks is the North American importer for both Slovenian brands. The Model 017 lives on bikes that have crossed serious mileage; the 2015-onward SRAM HRD road and gravel platform has seen a lot of seasons.

Pro tip from our mechanics

SRAM HRD pads run hotter at the lever end than many road riders expect: the flat-mount caliper body has less surface area to dissipate heat than the older post-mount design, and a long sustained descent (e.g., a 30-minute alpine drop) can push the pad's working temperature higher than the rider would predict from the rotor's appearance. Sinter's organic compound holds at that temperature; if you've ever felt a SRAM HRD pad start to feel “wooden” near the end of a long descent, it's the pad telling you it's near its working ceiling. The fresh Sinter set resets the working envelope.

For the broader compound primer and fitment grid, see How to choose Sinter brake pads →.