What I shoud have asked is do they fit straight on an Aprc and the answer is.... no they don't. The tone wheel or sensor rotor fouls the sensor itself and potentialy will knaker both. Ended up with a minor bend in the disc which rendered the system inactive and it switched itself off. Managed to straighted the rotor, put it back on and all's well. So Aprc owners be careful when changing wheels or tyres that the sensor rotor is protected at all times.