When I have a tire question like that I go to an online dealer like biketiresdirect.com (I am sure there are other sellers as good or better) and use their filtering system to display the choices.My Delite is fitted with Rock Razor tyres (27.5 × 2.35-650B). I'm just wondering what choices I have other than the Rock Razors? I'd like something with a little less rolling resistance as I mostly ride on public roads here in the UK. What would you all recommend? Thanks.