Tracking your progress on gravel just got easier and more accurate with Sram`s latest offeringSpider-based power meter and removable Thread Mount chainrings, the RED XPLR power meter is lightweight, reliable in all weather, and accurate within +/-1.5%All-new design with removable and replaceable thread-mount chainrings, available in 38T-46TUltra-light hollow carbon fiber crankarms are 29 grams lighter than previous generationUser replaceable CR2032 battery with 200-hour battery lifeDUB bottom bracket adds durability and simplicityMeasures right and left leg power balance172.5x42DUB WideCRBNThread Mount1x12/13UPC/EAN/GTIN: 710845904875