
The facts.
| Part number | AGPA288STMX |
|---|---|
| Compound | Off-road sintered (STMX) |
| Dimensions | 94 × 33.5 × 7.4 mm |
| Material | Sintered copper friction material with abrasives and carbon, for off-road use |
| Friction coefficient | 0.65 average (0.58 minimum, 0.72 maximum), JASO regulation |
| Density | 4.50 g/cm³ at 20 °C (+0.10 / −0.05) |
| Temperature resistance | 450 °C working, 600 °C maximum |
| Contents | 2 brake pads, one set for one caliper |
DescriptionThe whole story▼
Rocky climbs, rooty descents, deep sand and water crossings: a Yamaha YZ250 from 2021 to 2026 can be ridden hard across all of them. For that kind of use Accossato offers the AGPA288 front pad in its Off-road sintered compound, SKU AGPA288STMX. It is designed for riders who race or train on demanding dirt terrain, whether a motocross track in poor conditions or a hard trail, and who need a front pad built for dirt and water.
Key Features
- STMX front pad for demanding dirt, SKU AGPA288STMX
- Yamaha YZ250, 2021 to 2026
- Made for rocks, roots, sand and water
- For racing and hard trail riding
- Front pad for dirt use
- Two pads per box for the front caliper
- Rear pad AGPP106 and discs DK111, DK168 listed
Construction and Material Quality
STMX is Accossato's compound for off-road riding, and on the 2021 to 2026 YZ250 it comes on the AGPA288 pad. Accossato's general claims include slow wear, reduced fade through controlled heat and strong stopping power. We add no material details and stay with the manufacturer's description.
Hard Terrain, Hard Use
On a steep, rocky descent the front brake of a YZ250 has to be precise: enough bite to control speed, but predictable enough not to lock the front on a wet rock. In sand or through water, dirt and grit reach the caliper constantly. The STMX pad is the compound for those conditions. After a hard day, clean the caliper, let it dry and check that the pistons move freely. For mixed weekends with less mud, the ST version of this pad is the more versatile choice. On rocky ground, also check the disc itself for knocks and bends, since a damaged disc will wear new pads unevenly.
Fitment and Compatibility
Model years 2021 to 2026 of the Yamaha YZ250 take AGPA288 at the front according to Accossato, and this STMX edition is aimed at dirt use. Earlier bikes from 2008 to 2021 use AGPA110; with 2021 in both entries, compare your old pads before ordering. One box covers the single front caliper. At the back, AGPP106 is listed for 2003 to 2026, also in STMX, and Accossato also names the discs DK111 and DK168. Clean grit from around the pistons before retracting them.
Road Approval
There is no ABE or test certificate in our records for this pad. It is sold for racing and competition use.
Scope of Delivery
Two pads in a single box for the front caliper.
Specifications
- Part number: AGPA288STMX
- Compound: Off-road sintered (STMX)
- Dimensions: 94 × 33.5 × 7.4 mm
- Material: Sintered copper friction material with abrasives and carbon, for off-road use
- Friction coefficient: 0.65 average (0.58 minimum, 0.72 maximum), JASO regulation
- Density: 4.50 g/cm³ at 20 °C (+0.10 / −0.05)
- Temperature resistance: 450 °C working, 600 °C maximum
- Contents: 2 brake pads, one set for one caliper
What's includedEverything in the box▼
- 1x Accossato brake pad set (2 pads)
DownloadsData sheet▼
FitmentWhich bikes this fits▼
- Yamaha YZ250 (2021–2026)
- Yamaha WR250F (2022–2026)
- Yamaha WR450F (2020–2022)
- Yamaha YZ125 (2021–2026)
- Yamaha YZ125X (2022–2025)
- Yamaha YZ250F (2020–2026)
- Yamaha YZ250FX (2025)
- Yamaha YZ250X (2024–2026)
- Yamaha YZ450F (2020–2022)
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Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
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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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