Sorry for this but I did search and am more confused. I purchased a Paver Mongoose and noticed it has 28x1.75's on it but don't see a lot of tires that size for sale. Some of the research I've done here indicates that it is a 700c. If so what not call it that? Also if a 27 is bigger than a 700 then if you change a 27 out for a 700 then the brade pads must be lowered which is true so then I surmise that it is smaller so how can a 28 be smaller than a 27?