Frequency rims are renowned for their craftsmanship, durability, rigidity, and tubeless simplicity. A UST-compliant inner rim profile provides standards-driven consistency while a tape and sealant system eliminates precious rotational weight. Our legendary I-Beam, 4D drilling, and WT69 Alloy further aid in lateral and torsional strength while maximizing lifespan. Add CID and you can walk into any shop and not worry about proprietary parts needed. Now available in 27.5" sizes as well.