Accossato rear brake pads AGPP106 for Yamaha WR250F (2003-2013, 2015-2024)
02 · Data & docs

The facts.

Technical data
Part numberAGPP106STMX
CompoundOff-road sintered (STMX)
Dimensions66.9 × 36 × 9.3 mm
MaterialSintered copper friction material with abrasives and carbon, for off-road use
Friction coefficient0.65 average (0.58 minimum, 0.72 maximum), JASO regulation
Density4.50 g/cm³ at 20 °C (+0.10 / −0.05)
Temperature resistance450 °C working, 600 °C maximum
Contents2 brake pads, one set for one caliper
DescriptionThe whole story▼

In enduro competition, the rear brake of a Yamaha WR250F is used almost constantly, and it spends the day buried in mud and grit. For the WR250F from 2003 to 2013 and 2015 to 2024, Accossato lists its AGPP106 rear pad, and this listing covers the Off-road sintered (STMX) compound. It is designed for riders who enter enduro events or ride hard in the dirt, where the rear brake is used to steer and control the bike in the worst conditions.

Key Features

  • AGPP106 rear pad, STMX off-road compound
  • For the WR250F, 2003 to 2013 and 2015 to 2024
  • Accossato's compound for off-road riders
  • Designed for mud, grit and water
  • Suited to enduro competition
  • One box, rear caliper
  • OR and ST also available

Construction and Material Quality

Accossato describes STMX as its compound for off-road riders. The rear brake in enduro riding is exposed to more mud and grit than any other part of the bike, and STMX is designed for that environment.

The Rear Brake in Enduro

Experienced enduro riders use the rear brake to steer, to control speed on steep descents and to keep the bike straight in deep ruts. On a WR250F, the rear pad works through mud, sand and water all day. STMX is intended to keep the rear brake usable under those conditions. In a special test, a consistent rear brake allows the rider to commit to lines without worrying about the pedal feel changing.

Maintenance Between Rides

After each ride, clean the caliper thoroughly, check pad thickness and inspect the disc. Enduro riding wears rear pads quickly, so keep a spare set ready in the van. On a two-day event, a quick look at the rear pads during the evening service tells you whether the WR250F will make it through the second day on the same set.

Fitment and Compatibility

Before racing, confirm the year of your bike: AGPP106 is catalogued for WR250F machines from 2003 to 2013 and from 2015 to 2024, and 2014 is missing from that list. Within those spans the carburettor bikes, the EFI models and the 2018 ENDURO GP are all included. The pad for the front wheel depends on the generation (AGPA51, AGPA110 or AGPA288). A single rear caliper takes one box. Riders changing discs at the same service can choose from DK111, DK168, DK268 and DK269 in Accossato's range. Clean the caliper body and pistons thoroughly, since packed mud stops the pistons retracting evenly, and pump the pedal until firm before the start.

Road Approval

No German ABE or test documentation is available. STMX is offered for off-road competition.

Scope of Delivery

Two AGPP106 STMX pads in one box for the rear caliper.

Specifications

  • Part number: AGPP106STMX
  • Compound: Off-road sintered (STMX)
  • Dimensions: 66.9 × 36 × 9.3 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 WR250F (2003–2013, 2015–2024)
  • Beta RR 125 2T (2018–2019)
  • Beta RR 300 2T (2013–2019)
  • Beta RR 390 4T (2015–2019)
  • Beta RR 430 4T (2015–2019)
  • Beta RR 480 4T (2015–2019)
  • GasGas EC 200 (2017)
  • GasGas EC 250 (2012–2020)
  • GasGas EC 300 (2012–2020)
  • Kawasaki KLX 450R (2007–2024)
  • Kawasaki KX250F (2004–2018, 2020)
  • Kawasaki KX450 (2019–2026)
  • Kawasaki KX450F (2006–2018)
  • Kawasaki KX450X (2021–2024)
  • Suzuki RM-Z 250 (2004–2026)
  • Suzuki RM-Z 450 (2005–2020)
  • Suzuki RMX450Z (2010–2018)
  • TM Racing MX 125 2T (2005–2025)
  • TM Racing MX 250 2T (2005–2025)
  • TM Racing MX 250 4T (2005–2025)
  • TM Racing MX 300 2T (2005–2025)
  • TM Racing MX 450 4T (2005–2019)
  • Yamaha WR 250 X (2008–2016)
  • Yamaha WR250R (2008–2020)
  • Yamaha WR450F (2003–2022)
  • Yamaha YZ125 (2003–2026)
  • Yamaha YZ250 (2003–2026)
  • Yamaha YZ250F (2003–2026)
  • Yamaha YZ250FX (2015–2021)
  • Yamaha YZ450F (2003–2022)
07 · Support

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08 · Paddock

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