Fitment
Will this fit?
Fitment data still being indexed for this product. Ask BuildBot for a fit-check against your vehicle.
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 Brembo GT RD57 (D58 window) 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.
WinmaX 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.
From $721WinmaX W6.5
Very close50–800°Cµ 0.47–0.50
The standout for sprints and hillclimbs: close to 0.5 friction from a 50°C floor, so it bites on lap one. WinmaX call it their best rally pad.
Fits the same caliper
More pads for the Brembo GT RD57 (D58 window).
Pairs well with
