DT Swiss EXC 330 Carbon discspecific 32 hole Prestadrilled black 27.5"Your steadfast ally, backing you for the boldest line choices, the EXC 330 is DT's strongest and most innovative carbon rim yet DT's cutting edge and patent pending moulding technique maximizes carbon layer compression and removes the requirement for any cosmetic additional outer layer meaning these rims are even lighter and ready straight out of the mold PURE carbon construction process is unique to DT and builds the rim in one piece from the outside