I had a set of 180's on my xc/trail bike to lighten things up for the past 500 mi and noticed some reduced power lately. Not a ton of heavy use since things aren't that steep here, so i pulled them to inspect. No sign of contamination but its just been slowly worsening over time. Compared to other braking systems ive had, this combo (ashima/XTR 2 pot/metal pad) never seemed to have the same level of power as even SLX with standard shimmy rotors.
Using calipers i was able to see that the middle of the rotor wears faster than the upper and lower swept area forming a concave 'gulley' of sorts and thus the pad forms a convex 'belly' shape. Its just a few thou but its there and not sure if its the culprit or a mild contributor. Maybe the pads/rotors were glazed and not working 100% but the uneven wear means a future pad swap would be an issue eventually Anyways, i put on a set of Magura Sl.2 rotors as they are almost as light but with much more mass and fresh pads and things are much better. Is this type of wear typical for this style of ultra minimal rotor? There really isn't much meat in the middle of the swept area so it seems likely it sees more wear.
Using calipers i was able to see that the middle of the rotor wears faster than the upper and lower swept area forming a concave 'gulley' of sorts and thus the pad forms a convex 'belly' shape. Its just a few thou but its there and not sure if its the culprit or a mild contributor. Maybe the pads/rotors were glazed and not working 100% but the uneven wear means a future pad swap would be an issue eventually Anyways, i put on a set of Magura Sl.2 rotors as they are almost as light but with much more mass and fresh pads and things are much better. Is this type of wear typical for this style of ultra minimal rotor? There really isn't much meat in the middle of the swept area so it seems likely it sees more wear.
