it's just a mono trial, which has a custom colour scheme you can't get anywhere else! but yes it's a very good brake if set up properly, i've felt really badly set up ones and really good ones too (mine for example ), so facing the mounts and shimming it properly is standard. steve oh and 180mm is a good size for the rear, standard pads are good enough... once bedded in they have immense bite! but there is a downside to the brake, which is overheating, will eventually lead to loss of power and bite until it cools down... so if you use the rear a lot you may want to consider that! steve