So, I've now read half a dozen threads about using different widths for front and rear tires. I know it's totally okay and endorsed by Sheldon Brown. But I'm looking at some Continental SportContacts and was wondering if 28 in the rear and 37 in the front was too big of a difference. These tires will be on a 2001 Bianci Boardwalk.

Thanks! And sorry if this should have gone in the noob section (first post).