Wtb frequency i 29 mtb rimthe wtb frequency i 29 mtb rim is part of a range of frequency rims from wtb all of which are renowned for their craftsmanship durability rigidity and tubeless simplicitya ust compliant inner rim profile provides standards driven consistency and a tape and sealant system eliminates precious rotational weight the legendary i beam 4d drilling and wt69 alloy further aid in lateral and torsional strength whilst also maximising lifespan features materialalloyusa