If you ride in the desert over goat thorns and land mines, buy those $300 woven steel and Kevlar tubes. Otherwise whatever works. I mean, all a tube does is hold in the air. Don't worry too much about size, either. (Valves are a consideration - usually only type and length - so tubes aren't completely interchangeable.)

Performance puts their tubes on sale at about half price a couple times a year: stock up.



And carry at least one spare.