"SRAM FORCE E1 Cassette (Model ID CS-XG-1270-E1) 12 speeds offered in a 10-28T, 10-30T, 10-33T or 10-36T range. Pair with any of our chainrings for your dream gearing setup. 
 
X-Range™ gearing gives you more range and a smoother gear progression, so you’re always in the right gear. Making road bikes faster and more capable than ever before
10-tooth start helps provide a wider gearing range
Nickel chrome plating for quiet and durability
FULL PIN construction for durability and light weight
Designed to work with an XDR™ driver body"
 
- SRAM