DT Swiss 350 Big Ride Fat Bike Rear Hub 32h 12x197mm Thru Axle Center Lock Disc Patented Star-Ratchet system(18T) Contact-free seals and high precision build guarantee smooth bearings Press-fit end caps allow tool-free maintenance and conversion Converts to 190mm QR XD with FW1923 and HU1338 Converts to 197mm thru axle XD with FW1923 and HU1341