e*thirteen Helix Race Cassette - 12-Speed 9-52t Naranja MFPN=1AA00091 All spring series come in

All spring series come in increments as small as 4 Nm/23 lbs/in making it easy to find a spring that suits your bike and riding style

When multiple axle lengths are listed

Color-matched stays and hardware included

9mm Length 410mm Setback Zero Material Aluminum Color Black

e*thirteen Helix Race Cassette - 12-Speed 9-52t Naranja MFPN=1AA00091 All spring series come inThe e*thriteen Helix Race 12 speed 9 52t cassette is engineered to deliver precision shifting performance with an industry leading 578% gear range. The proprietary 9 tooth smallest cog combined with the 52t largest cog enables the use of a smaller chainring for improved clearance lighter system weight and a lower bail out gear ratio without high gear compromise. Seamless cross compatibility with Shimano SRAM and TRP 12 speed drivetrains Patented 2