Originally Posted by rpenmanparker

First look yourself to see if you have about 4 mm of clearance on all sides of 25 mm tires including underneath the fork crown. If not, you can't use 28s. Send it back. Tell them they screwed up. The return shipping is on them. If you can spring for a few more bucks, I think you would be happier with one of the slightly higher level Gran Premios. The 520 sticker clearly shows on the higher models in the photos, and the paint jobs look nicer. And, of course, the components are nicer too.

Also keep in mind that 520 is just plain Jane chrome-moly steel, nothing too special. If your bike is any popular chrome-moly, it should be fine. Of course, you are right to want what was promised.