Helix Race e*spec Chainrings merge cutting-edge design and performance. Designed for TQ HPR50 equipped e-bikes, this 1pc direct mount chainring is forged from 7075 AL for lightweight durability, impressive stiffness, and a standout technical aesthetic.The new M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano, Sram, and TRP 11/12s drivetrains, including SRAMT-Type. It's available in black and silver for coordination with e*thirteen cranks, cassettes, stems, tubeless valves, and more. Available in 32T and 34T sizes, it supports dropping a chainring size to take full advantage of e*thirteens proprietary 9T smallest cog, wide range cassettes.