SRAM Red E1 XG-1290 10-30 12 Speed Cassette Rainbow Colour:Rainbow It protects your derailleur against

It protects your derailleur against chain jams by pivoting back and out of the way

Shoulder strap

6% spandex

use 118/73 Powerspline Bottom Brackets

results prove so

SRAM Red E1 XG-1290 10-30 12 Speed Cassette Rainbow Colour:Rainbow It protects your derailleur againstAbout SRAM Red E1 XG 1290 10 30 12 Speed Cassette Rainbow Wide range and tight jumps? Why not both? SRAM's lightest, most durable cassette breaks new ground for gearing choices as well. Four distinct cassette options, including SRAM's first 10 30T and 10 36T RED cassettes, each provide secure shift ramps specifically designed for electronic shifting, whether racing road on a 10 28T or creating an all road setup with a 10 36T. Carefully chosen tooth