I had a need to have my speed/distance recorded on my rear tire. For two years I was able to do this (barely) with the wireless sensor mounted to the rear triangle instead of the front fork. However, In recent weeks it stopped working reliably. I bought the CR2450 Universal Wire mount to provide a wired pickup on the rear triangle. Delivery was quick. It was an easy install and it does exactly as advertised... it reliably monitors the turning of the rear wheel to enable the computer to determine speed and distance. I am delighted with both the service and the performance of the product.