Cross riders fear not, your rim is supported. Yes, a robust pillar, the I-Beam, runs down the center of the Frequency CX’s rim cavity. Correct- you should go find some barriers to bunny-hop. Fortunately, they’re as svelte as they are stiff thanks to WT69 Alloy and with a true TCS profile, tubeless setup is a breeze. So go ahead, build a set and make the rest of the field jealous.. better yet, storm past and force them to keep up.