Okay, I know I should have asked here before hitting the buy button, but still it'd be nice to know I've got this right. My hybrid has 622-19 rims with 700x35C Kenda tyres. I've just ordered, from eBay, 700x28C Schwarbe Marathon Plus tyres. According to a nice chart Sherradons website they should fit fine, can anyone confirm I haven't just bought totally the wrong thing? Am I right in thinking that thinner tires will be lighter and faster due to less road resistance as there is less rubber making contact with the tarmac? Cheers.