I extracted this tyre discussion from the Comnoz valve spring thread, so as not to derail his thread! The conversation was regarding the fact that using a dedicated rear will increase tyre miles by a 3rd when compared to a Universal tyre. Given the fact that rear tyre wear can be rapid and therefore an issue, this seems important (to me at least). Question from Mr Rick was: “And is there a dedicated 19" rear tyre you can recommend?” Not from the Roadrider range unfortunately. That’s why I use an 18” rear. It allows me to use a dedicated rear 18” and a front universal 19” that have exactly the same rolling radius, thus maintaining the intended geometry, providing great handling, and giving the best possible tyre life. Works for me !