Contact Us

Mon-Fri 9am-5pm MST


Sram XG-1299-B1 Eagle 12-Speed Cassette 52T



Whether for prized race machines or the build of their dreams, the Sram XG-1299 Eagle 12 Spd B1 Cassette is the ultimate, giving riders unprecedented 520-percent range thanks to the new 10-52 tooth-span. Stronger racers are now free to choose larger chainrings for more top-end speed, without sacrificing climbing range. More time is spent higher up in the cassette where athletes power transfer is most efficient and wear is minimized. Featuring the industry's strongest X-Dome architecture and proven XD driver body, it's also backwards compatible to give riders even more Eagle upgrade options for their current bikes. With multiple Olympic, World Cup and World Championship titles, it also matches up perfectly to XX1 Eagle AXS enabled componentry. The XG-1299 cassette utilizes the full depth of the new Eagle Colorsystem. Available in Black to Gold to Rainbow and all-new Copper, the XG-1299 cassette completes the expression of the worlds most accomplished and sought after bikes.
  • Stronger riders can increase chainring size for speed, without sacrificing climbing.
  • Eagle Colorsystem lets the cassette and chain express the look of the bike.
  • Available in Black, Gold, Rainbow and all-new Copper.
  • Provides a massive 520-percent gear range.

  • SPEED (CS): 12s
  • GEARING: 10-52t
  • COG FINISH (CASSETTE): Copper, Gold, Rainbow
  • COG SIZES: 10-52t:10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 52
  • WEIGHT (G): 350

Model Number
Item Code
Sram XG-1299-B1 Eagle 12-Speed Cassette 52T