The compound
WinmaX W5.
WinmaX call W5 their standard circuit model, and it is the compound most Australian club racing runs on. It asks for around 100°C before it is at its best, so it is a full-session race pad rather than a road one, and holds friction to 750°C. If you are choosing one compound for a club race weekend and nothing else is known, this is the sensible starting point.
Operating range100–750°C
Friction µ0.40–0.43
Cross-brand equivalents
Run something similar.
These are the compounds we stock for the Mazda RX8 rear whose published friction and operating temperature come closest to WinmaX W5. They are a starting point for switching brands — not a guarantee of identical feel, because each manufacturer measures friction on their own equipment.
Circo M155
Close200–850°Cµ 0.37–0.42
An endurance compound built for consistency over long races.
Matched on published friction and operating temperature.
From $701Circo M192
Close100–750°Cµ 0.37–0.41
An endurance rear pad developed for GT3 and GT4 machinery.
Matched on published friction and operating temperature.
From $701Project Mu PCR09
Close300–800°Cµ 0.42–0.55
Project Mu’s Club Racer. A strong trackday pad, but with a 300°C floor it is the range’s worst choice for a cold first lap.
Matched on published friction and operating temperature.
From $330Fits the same caliper
More pads for the Mazda RX8 rear.
Project Mu · R433-NS-C
Project Mu NS-C Street Brake Pads Mazda RX8 rear (R433-NS-C)
$147
● Out of stock
Pairs well with
