The compound
Circo M127.
A sprint and time-attack compound with more outright friction than M119, reaching 0.55 at the top of its range. The trade is the floor: it wants 150°C in it, so on a single cold run M119 will usually give you more brake despite the lower peak.
Operating range150–850°C
Friction µ0.45–0.55
Pad life'Pad wear is higher than other CIRCO compounds' - explicitly published as the shortest-life Circo compound. No numeric figure.
Cross-brand equivalents
Run something similar.
These are the compounds we stock for the AP Racing 6-pot RD54 (with tab) whose published friction and operating temperature come closest to Circo M127. They are a starting point for switching brands — not a guarantee of identical feel, because each manufacturer measures friction on their own equipment.
Project Mu H16-03
Very close200–650°Cµ 0.45–0.60
Project Mu’s GT and TCR-level race compound.
Matched on published friction and operating temperature.
From $572 · in stockWinmaX W7
Very close100–850°Cµ 0.48–0.53
The top of the W-series — professional circuit and rally use, and the highest friction WinmaX publish.
Matched on published friction and operating temperature.
Fits the same caliper
More pads for the AP Racing 6-pot RD54 (with tab).
Pairs well with
