Spare Cateye Strada Double Wireless Sensor Kit. This sensor is compatible only with the RD400DW (Strada Double Wireless). It can be really annoying having to buy separate computers for all your bikes to do different things. With Cateye computers now having more functions than ever before, it is now possible for you to swap your Cateye computer easily, with no messing around with un-tying and tying wires to your bike frame. Easy to install with its cable tie securing method, this little sensor and bracket stops you from forking out twice as much on a new computer.