The tyre dealer, who (finally) changed the winter bikes to summer bikes today, said that the RDKS had to be replaced (after 4 years). Interestingly, the original RDKS have no battery and therefore have to be completely replaced. I find that double strange: first of all this “no battery” thing second after 4 (half) years. I always thought the sensors only send when the wheel moves… How do you see that or know more precisely? LG Mi-go