I know several UT fans and even more OU fans. Now THAT is a rivalry.
Red River Shootout: A long standing rivalry
KSU vs UT: An up and coming rivalry. They are blacking us our for football, we are blacking them out for basketball.

KSU vs Nubbs: 75% of fans hate the other team, the other 25% have extreme mutal respect. Always makes for a good football matchup
KSU vs ku: ku claims thier piss match versus Mizzou is a rivalry and K-State is not. The reality is that KSU has arrived in basketball and ku is improving in football but has only won recent games as they are taking advantage of KSU's off years. However, all both schools continue to improve in both sports, the national media will call it a rivalry, but we won't.
ku vs Mizzou: Just an old civil war revival that is nothing more than a piss match
So, the question is who is ku's rival since Mizzou is just a piss match. Buknell? This weeks idle? Or a Salad?