E*thirteen has spared no expense in developing the Helix R e*spec chainring. Designed for Bosch Gen 4 e-bikes, this directly mounted chainring is forged from 7075 AL for stiffness, strength, and the longest lifespan. The intricate CNC machining and M3 tooth profile result in an ultra-lightweight upgrade chainring that offers the best cross-compatible Shimano/SRAM chain mount and a striking technical aesthetic. A specially crafted outer dust cover emphasizes the integrated style and helps prevent contamination.

The Helix Race e*spec chainring is fully compatible with Shimano, SRAM, and TRP drivetrains with 11 and 12 speeds and is available in black, bronze, aubergine purple, or naranja orange to match e*thirteen cranks, cassettes, stems, tubeless valves, and more. Available with a 53 mm chainline in sizes 32T and 34T, it supports downsizing a chainring size to take advantage of e*thirteen's proprietary 9T smallest cog and wide-range cassettes.