The facts.
| Part number | AGPA177ST |
|---|---|
| Compound | Sintered (ST) |
| Dimensions | 85 × 50.8 × 8 mm |
| Material | Sintered copper friction material with abrasives and carbon |
| Friction coefficient | 0.46 average, 0.52 maximum (dyno test to JASO standard) |
| Density | 4.50 g/cm³ at 20 °C (+0.10 / −0.05) |
| Hardness | 90 HRR (± 10 HRR, Rockwell HRR scale) |
| Temperature resistance | 450 °C working, 600 °C maximum peak |
| Minimum shear strength | 30 kg/cm² |
| Contents | 2 brake pads, one set for one caliper |
DescriptionThe whole story▼
The Sportster S RH1250S, built by Harley-Davidson from 2021, sits at the sportier end of the Sportster range, and the front brake has to match that character. Accossato's Sintered (ST) front pad is built for exactly that caliper, holding a steady, dependable bite through cold starts and wet weather on a bike that invites a firmer hand on the lever.
Key Features
- Sintered (ST) compound for the Sportster S RH1250S front caliper
- Listed by Accossato for the 2021 to 2025 model years
- High, constant grip claimed by the maker at hot and cold temperatures
- Keeps biting once the disc has picked up rain
- Suited to the sportier Sportster S ridden through the seasons
- Alternative EV1, EV2 and ZXC front compounds exist for the same caliper
- Two pads per box, enough for one front caliper
Construction and Material Quality
Accossato's stated case for this ST mixture is a steady, high level of grip across hot and cold conditions, with bite that holds up once the disc has picked up water rather than fading in the rain. The Sportster S is ridden harder and later into a bend than a typical Harley cruiser, and a front pad that behaves consistently regardless of temperature or moisture suits a bike that gets ridden hard on a damp morning as readily as on a dry afternoon, which is exactly how most Sportster S owners actually use the bike, whatever the forecast happens to say that particular morning.
A Modern Sportster Needs a Dependable Pad
Riders who use the Sportster S for real commuting as well as weekend riding ask the front brake to cope with a wider range of conditions than the bike's muscular styling suggests, from cold starts outside the house to standing water further along a familiar route. This Sintered set is matched to that range, giving a confident first bite whether the ride begins in sunshine or under cloud. As with any new front pad, it is worth bedding the compound in gradually over the first few rides and checking that the lever has firm pressure before setting off, rather than expecting full bite from the very first stop.
Fitment and Compatibility
Accossato lists this front pad for the Sportster S RH1250S across the 2021 to 2025 model years. Confirm your exact year before ordering; three further front compounds, EV1, EV2 and ZXC, are built for this same caliper for riders with sportier intentions than ordinary all-weather commuting.
Road Approval
No approval paperwork, such as a German ABE or a type approval mark, is available to us for this pad, so it is listed for racing and competition use in markets that require that documentation for road riding. Please check your own country's rules first.
Scope of Delivery
Two brake pads in the box, one set for a single front caliper. Mounting hardware such as pins or springs is not part of the package.
Specifications
- Part number: AGPA177ST
- Compound: Sintered (ST)
- Dimensions: 85 × 50.8 × 8 mm
- Material: Sintered copper friction material with abrasives and carbon
- Friction coefficient: 0.46 average, 0.52 maximum (dyno test to JASO standard)
- Density: 4.50 g/cm³ at 20 °C (+0.10 / −0.05)
- Hardness: 90 HRR (± 10 HRR, Rockwell HRR scale)
- Temperature resistance: 450 °C working, 600 °C maximum peak
- Minimum shear strength: 30 kg/cm²
- Contents: 2 brake pads, one set for one caliper
What's includedEverything in the box▼
- 1x Accossato brake pad set (2 pads)
FitmentWhich bikes this fits▼
- Harley Davidson SPORTSTER S RH1250S (2021–2025)
- Aprilia CAPONORD 1200 (2013–2019)
- Aprilia CAPONORD 1200 RALLY (2015–2019)
- Aprilia RS 660 (2020–2025)
- Aprilia TUONO 660 (2022–2025)
- Aprilia TUONO V4 1100 (2015)
- Aprilia TUONO V4 1100 FACTORY (2015–2016)
- Aprilia TUONO V4 1100 RR (2015–2016)
- BMW F800R (2015–2018)
- BMW F900R (2020–2026)
- BMW F900XR (2020–2026)
- BMW R NINET (2014–2023)
- BMW R12 NINET (2024–2026)
- BMW R1200GS (2013–2018)
- BMW R1200GS ADVENTURE (2014–2018)
- BMW R1200RS (2014–2018)
- BMW R1200RT (2014–2018)
- BMW R1250R (2019–2024)
- BMW R1250RS (2019–2024)
- BMW S1000 XR (2015–2026)
- CFMOTO 400SR S (2024)
- CFMOTO 450 SR (2023–2026)
- Ducati DIAVEL 1260 (2019–2022)
- Ducati HYPERMOTARD 698 Mono (2024–2026)
- Ducati HYPERMOTARD 821 (2013–2016)
- Ducati HYPERMOTARD 939 (2016–2018)
- Ducati HYPERMOTARD 950 (2019–2024)
- Ducati HYPERMOTARD 950 RVE (2020–2024)
- Ducati HYPERMOTARD 950 SP (2019–2024)
- Ducati Hyperstrada 821 (2013–2016)
- Ducati Hyperstrada 939 (2016–2018)
- Ducati MONSTER 1200 (2014–2021)
- Ducati MONSTER 797 (2017–2021)
- Ducati MONSTER 821 (2014–2021)
- Ducati MONSTER 821 DARK (2015–2016)
- Ducati MONSTER 937 (2021–2024)
- Ducati MULTISTRADA 1200 (2015–2016)
- Ducati MULTISTRADA 1200 ENDURO (2016–2018)
- Ducati MULTISTRADA 1260 ENDURO (2019–2021)
- Ducati MULTISTRADA 950 (2017–2021)
- Ducati MULTISTRADA V2 (2022–2024)
- Ducati MULTISTRADA V2S (2022–2024)
- Ducati MULTISTRADA V4 (2021–2026)
- Ducati Panigale 899 (2014–2015)
- Ducati Panigale 959 (2016–2020)
- Ducati Panigale V2 955 (2020–2024)
- Ducati SCRAMBLER 1100 (2018–2024)
- Ducati SCRAMBLER 1100 SPECIAL (2018–2019)
- Ducati SCRAMBLER 1100 SPORT (2018–2024)
- Ducati SCRAMBLER 800 (2017–2026)
- Ducati SCRAMBLER CLASSIC (2015–2019)
- Ducati SCRAMBLER ICON (2015–2026)
- Ducati STREETFIGHTER V2 955 (2022–2024)
- Ducati SUPERSPORT 939 (2017–2020)
- Ducati SUPERSPORT 939 S (2017–2020)
- Ducati SUPERSPORT 950 (2020–2024)
- Ducati SUPERSPORT 950 S (2020–2024)
- Ducati X DIAVEL DARK (2024)
- Fantic Motor Caballero 500 (2017)
- Harley Davidson PAN AMERICA RA1250 (2021–2022)
- Harley Davidson PAN AMERICA SPECIAL RA1250S (2021–2022)
- Indian FTR 1200 (2019–2025)
- Indian FTR 1200 R CARBON (2021–2025)
- Indian FTR 1200 RALLY (2019–2024)
- Indian FTR 1200S (2019–2023)
- Indian PURSUIT (2022–2025)
- KTM 690 SMC R (2021–2024)
- Kawasaki Z H2 (2020–2026)
- Kawasaki Z900 SE (2022–2026)
- Kove 321RR (2023)
- MV Agusta Rivale 800 (2013–2017)
- MV Agusta STRADALE 800 (2015–2016)
- MV Agusta TURISMO VELOCE LUSSO RC SCS 800 (2014–2019)
- Moto Guzzi STELVIO (2024–2025)
- Moto Guzzi V100 MANDELLO (2022–2023)
- Norton COMMANDO 961 SPORT (2018–2019)
- Norton DOMINATOR 961 (2017–2019)
- QJMotor SRK 600 RR (2023)
- QJMotor SRK 800 RR (2024–2025)
- QJMotor SVT-650 X (2024–2026)
- Triumph STREET TRIPLE 765 R LOW (2017–2023)
- Triumph Street Triple 765 R (2017–2023)
- Triumph TIGER 1200 XR (2018–2019)
- Triumph TIGER 1200 XRX (2018–2020)
- Triumph TIGER 1200 XRX LOW (2018–2020)
- Triumph TIGER EXPLORER (2016–2017)
- Voge Brivido RR 525 (2024)
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Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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