WTB Frequency Team i25 TCS Rim: 27.5", 32 hole, Black

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.WTB's 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.
Unbendium Bulge-a band of material added to the sidewall of the rim to counter torsional, radial and lateral flex
4D drilling provides a perfect interface between the rim and spoke and eliminates the need for eyelets
I-Beam: a vertical beam designed to counter spoke loads and provide torsional rigidity
On-Ramp feature provides consistent fit between rims and tire for easy installation and inflation
WT69 Alloy has superior strength and remains super light
Tubeless Compatible System (TCS)—rim profile is designed especially for TCS or UST tires and will also work with tube-type tires when used with tubes. TCS rims feature superior tire retention capabilities. TCS rim tape, valves and sealant is needed to run a tubeless set-up with TCS or UST tires