My first job was in a bike shop that sold Trek bikes. They had their own brand of rim and tires (Matrix), and Matrix tires were an almost impossibly tight fit on Matrix rims.
I also bought a pair of Ritchey WCS tires that were on clearance, I believe because they were borderline defective they were so tight on some WTB rims that other tires fit on fine.
Funnily enough, the bike with Ritchey tires was stolen from my yard, then a friend found it on the roadside in the next town being thrown out with the trash a few years later. There was a cut in one of the tires and I suspect the 'new owner'(thief) gave up trying to get the tire off and just threw the bike out.