DT Swiss 240 EXP Straightpull MTB Rear Hub The Hub That Earns Its Place on a Custom Build When you're spec'ing a custom wheel around performance and long-term reliability, the rear hub is not where you cut corners. The 240 EXP Straightpull sits at the performance tier of the DT Swiss hub lineup, pairing the Ratchet EXP freehub system with a straightpull flange designed for the demanding spoke geometry of high-tension custom builds. Ratchet EXP merges the ratchet ring and threaded ring into a single component, which reduces weight and part count while increasing bearing distance for longer bearing service life. Ratchet upgrades are swappable, and the end caps are tool-free for straightforward trailside maintenance when it matters. Features12x148mm Boost Thru-Axle fits current Boost-standard MTB frames, the dominant rear axle standard on trail and enduro bikes from 2015 onward Ratchet EXP with 36T ratchet rings full-face ring-to-ring engagement across 36 teeth for direct power transfer and a freehub system that is lighter and more durable than the Ratchet LN generation Straightpull spoke lacing eliminates the J-bend stress point for a stronger, more consistent spoke interface on high-tension custom wheel builds28H spoke drilling matches the spoke count on most XC and trail-oriented rims in the 28-hole pattern Sealed cartridge bearings pre-greased and replaceable, with increased bearing distance in the Ratchet EXP design for extended service intervals Tool-free end cap removal simplifies bearing service and axle standard conversion without needing shop tools on the trail Specifications Position Rear Axle Standard12x148mm Boost Thru-Axle Freehub Standard SRAM XD / Shimano HG (swappable)Spoke Count28HEngagement36T Ratchet EXP (10deg)Bearing Type Sealed Cartridge Shell Material Weight Intended Use XC, Trail, All-Mountain | Dt Swiss | 240 Exp Straightpull Mtb Rear Hub 12X148Mm, 28H, 6-Bolt, Xd, 36T