e*Thirteen Helix Race 12-Speed Cassette - Black Variant:9-52T Four different mounting positions let

Four different mounting positions let you fine-tune the mounted component with the convenience of its out-front location

Size:  29" / 700C

90mm CLAMP DIAM 31

5mm outboard chain line design to allow wider tire clearance for mixed-terrain riding

e*Thirteen Helix Race 12-Speed Cassette - Black Variant:9-52T Four different mounting positions letHELIX RACE 12 SPEED CASSETTE MOST RANGE. CROSS COMPATIBLE. e*thirteen expanded drivetrain possibilities for every rider with our original 9 50T Helix Race Cassette with 533% gear range. Our proprietary 9t sprocket and patented two piece construction gave riders an unprecedented ability to build the drivetrain of their choice. Now, weve built on that winning formula and added a 52T sprocket for an eye watering 578% total range. Love to grind climbs?